Concave interval calculator - Click on the specific calculator you need. Input. Type or paste your data into the fields provided. Ensure that your data is entered correctly to get accurate results. Calculation. Once the data is entered, click the "Calculate" button. Result. The calculator will display the result instantly. To solve another problem, modify the existing input.

 
Increasing, concave. Correct answer: Decreasing, convex. Explanation: First, let's find out if the graph is increasing or decreasing. For that, we need the first derivative. To find the first derivative, we can use the power rule. We lower the exponent on all the variables by one and multiply by the original variable.. Dollar tree huntington park ca

Correct answer: Explanation: The intervals where a function is concave up or down is found by taking second derivative of the function. Use the power rule which states: Now, set equal to to find the point (s) of infleciton. In this case, . To find the concave up region, find where is …If the second derivative is positive on a given interval, then the function will be concave up on the same interval. Likewise, if the second derivative is negative on a given interval, the function will be concave down on said interval. So, calculate the first derivative first - use the power rule. #d/dx(f(x)) = d/dx(2x^3 - 3x^2 - 36x-7)#Free inequality calculator - solve linear, quadratic and absolute value inequalities step-by-step We've updated our ... 3A.2 Learning Objectives Use interval notation to describe intersections and unions Use graphs to describe intersections and unions Solve compound inequalities in the form of or and express the solution graphically and with an ...Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more.Flesch Kincaid Calculator. This Flesch Kincaid Calculator can be used to show how readable your text is by providing a Flesch Readability Ease score and the Flesch-Kincaid Grade Level score. Instructions: Cut-and-paste the text you want to test into the box below, then click "Calculate"; this will give you the text's readability scores.Test interval 3 is x = [4, ] and derivative test point 3 can be x = 5. Find the intervals of concavity and the inflection points. so over that interval, f(x) >0 because the second derivative describes how 54. 46. WebA concavity calculator is any calculator that outputs information related to the concavity of a function when the function is ...(5 points) Please answer the following questions about the function 3.22 f(x) = 22 - 25 (c) Calculate the second derivative off Find where fis concave up.concave down and has infection ponts "() Union of the intervals where f(x) is concave up Union of the intervals where f(x) is concave down infection points (d) The function is ? 2 because for an in the man of and therefore its graph is ...Equations Inequalities Scientific Calculator Scientific Notation Arithmetics Complex Numbers Polar/Cartesian Simultaneous Equations System of Inequalities Polynomials Rationales Functions Arithmetic & Comp. Coordinate Geometry Plane Geometry Solid Geometry Conic Sections TrigonometryTo determine concavity, analyze the sign of f''(x). f(x) = xe^-x f'(x) = (1)e^-x + x[e^-x(-1)] = e^-x-xe^-x = -e^-x(x-1) So, f''(x) = [-e^-x(-1)] (x-1)+ (-e^-x)(1) = e^-x (x-1)-e^-x = e^-x(x-2) Now, f''(x) = e^-x(x-2) is continuous on its domain, (-oo, oo), so the only way it can change sign is by passing through zero. (The only partition numbers are the zeros of f''(x)) f''(x) = 0 if and only ...The connection between the second derivative and concavity leads to the next series of steps. Step 4: Calculate f00and determine where it is positive and where it is negative. That tells us where the graph is concave up and where it is concave down. The endpoints of such intervals are clearly important points. They are called points of inHere's the best way to solve it. Find the inflection points. Find the interval on which f is concave up. Find the interval on which f is concave down. Step 1 We have f' (x) = 4 cos (x) - 4 sin (x), so f" (x) = -4 cos (x) - 4 sin (x) - 4 sin (x) - 4 cos (x) which equals 0 when tan (x) = -1 Hence, in the Interval o <x< 211, f' (x) = 0 77 ...Advanced Math. Advanced Math questions and answers. Let f (x)= (x−3)3+2. Use a graphing calculator (like Desmos 닥) to graph the function f. a. Determine the interval (s) of the domain over which f has positive concavity (or the graph is "concave up"). b. Determine the interval (s) of the domain over which f has negative concavity (or the ...Get the free "Parametric equation solver and plotter" widget for your website, blog, Wordpress, Blogger, or iGoogle. Find more Mathematics widgets in Wolfram|Alpha.A graph is increasing or decreasing given the following: Given any x 1 or x 2 on an interval such that x 1 x 2, if f (x 1) f (x 2 ), then f (x) is increasing over the interval. Similar Tools: concavity calculator ; find concavity calculator ; increasing and decreasing intervals calculator ; intervals of increase and decrease calculator, Sum of ...For example, the function x2 x 2 takes the reals (domain) to the non-negative reals (range). The sine function takes the reals (domain) to the closed interval [−1,1] [ − 1, 1] (range). (Both of these functions can be extended so that their domains are the complex numbers, and the ranges change as well.) Domain and Range Calculator: Wolfram ... Free Pre-Algebra, Algebra, Trigonometry, Calculus, Geometry, Statistics and Chemistry calculators step-by-step If f '' 0 on an interval, then f is concave down on that interval. If f '' changes sign (from positive to negative, or from negative to positive) at some point x = c, then there is an Inflection Point located at x = c on the graph. The above image shows an Inflection Point. It occurs when concavity changes. It is the Point of Steepest Slope. Free functions inflection points calculator - find functions inflection points step-by-step Concavity. The concavity of the graph of a function refers to the curvature of the graph over an interval; this curvature is described as being concave up or concave down. Generally, a concave up curve has a shape resembling "∪" and a concave down curve has a shape resembling "∩" as shown in the figure below. Concave up.Use a graphing calculator (like Desmos) to graph the function f. a. Determine the interval(s) of the domain over which f has positive concavity (or the graph is "concave up"). (2, 4) (3, 5): invalid interval notation b. Determine the interval(s) of the domain over which f has negative concavity (or the graph is "concave down").Free Interval of Convergence calculator - Find power series interval of convergence step-by-stepCompute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history ...Definition of Convexity of a Function. Consider a function y = f (x), which is assumed to be continuous on the interval [a, b]. The function y = f (x) is called convex downward (or concave upward) if for any two points x1 and x2 in [a, b], the following inequality holds: If this inequality is strict for any x1, x2 ∈ [a, b], such that x1 ≠ ...Now, critical numbers calculator applies the power rule: x^2 goes to 2x. So, the result is: 8x. Then critical points calculator with steps applies the power rule: x goes to 1. Hence, the x is: 8. The result is: 8x + 8. Finally, critical numbers calculator finds critical points by putting f' (x) = 0. 8x + 8 = 0. Local Minima.In Mathematics, the inflection point or the point of inflection is defined as a point on the curve at which the concavity of the function changes (i.e.) sign of ...Possible Answers: Correct answer: Explanation: To find the increasing intervals of a given function, one must determine the intervals where the function has a positive first derivative. To find these intervals, first find the critical values, or the points at which the first derivative of the function is equal to zero.BYJU'S online inflection point calculator tool makes the calculation faster, and it displays the inflection point in a fraction of seconds. ... In Mathematics, the inflection point or the point of inflection is defined as a point on the curve at which the concavity of the function changes (i.e.) sign of the curvature. The inflection point can ...Do not calculate the derivative by hand and then use your calculator to plug the value in. ... calculator is available! ... On what intervals is f concave up? ( ...Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more. Derivative Calculator. Save Copy. Log InorSign Up. f x = sin x. 1. …Compound interest is calculated using the compound interest formula: A = P (1+r/n)^nt. For annual compounding, multiply the initial balance by one plus your annual interest rate raised to the power of the number of time periods (years). This gives a combined figure for principal and compound interest. Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more. Concavity and Inflection Points | Desmos The graph is a curve. The curve starts on the positive y-axis, moves upward concave up and ends in quadrant 1. An area between the curve and the axes is shaded. ... then the Riemann sum will be negative. The total area between the endpoints of the interval for some curve is really a net area, where the total area below the x­-axis (and above ...Business calculus can be a tough course to pass. I'm here to help! This lesson is about average rate of change and how it can be used to motivate the conce...You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Question: Determine the open intervals on which the graph of the function is concave upward or concave downward. (Enter your answers using interval notation. If an answer does not exist, enter DNE.) y = 3x + 5 sin (x) , (−𝜋, 𝜋) Determine the ...Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more. Function Calculator. Save Copy. Log InorSign Up. f x = 1. Type in any function above then use the table below to input any value to determine the output: ...This calculus 2 video tutorial explains how to find the second derivative of a parametric curve to determine the intervals where the parametric function is c...That over this whole interval, g prime prime of x is less than zero, which means that over this interval we are concave downwards. So concave, concave downward, concave downward. Now let's go to the interval between negative one and one. So this is the open interval between negative one and one. And let's try a value there.Free Pre-Algebra, Algebra, Trigonometry, Calculus, Geometry, Statistics and Chemistry calculators step-by-stepIn other words, the function \(f\) is concave up on the interval shown because its derivative, \(f'\text{,}\) is increasing on that interval. Similarly, on the righthand plot in Figure \(\PageIndex{7}\), where the function shown is concave down, we see that the tangent lines alway lie above the curve, and the slopes of the tangent lines are ...For the inequality to interval notation converter, first choose the inequality type: One-sided; Two-sided; or. Compound, and then choose the exact form of the inequality you wish to convert to interval notation. The last bit of information that our inequality to interval notation calculator requires to work properly is the value (s) of endpoint ...Find any inflection points Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice A. The function is concave up on and concave down on (Type your answers in interval notation. Use a comma to separate answers as needed) B. The function is concave up on (−∞,∞) C. The function is concave down on ...Recall that the first derivative of the curve C can be calculated by dy dx = dy/dt dx/dt. If we take the second derivative of C, then we can now calculate intervals where C is concave up or concave down. (1) d2y dx2 = d dx(dy dx) = d dt(dy dx) dx dt. Now let's look at some examples of calculating the second derivative of parametric curves.Now that we know the second derivative, we can calculate the points of inflection to determine the intervals for concavity: f ''(x) = 0 = 6 −2x. 2x = 6. x = 3. We only have one inflection point, so we just need to determine if the function is concave up or down on either side of the function: f ''(2) = 6 −2(2)Free integral calculator - solve indefinite, definite and multiple integrals with all the steps. Type in any integral to get the solution, steps and graph ... of Inequalities Basic Operations Algebraic Properties Partial Fractions Polynomials Rational Expressions Sequences Power Sums Interval Notation Pi ...The opposite is true when a curve is concave up. In that case, each trapezoid will include a small amount of area that's above the curve. Since that area is above the curve, but inside the trapezoid, it'll get included in the trapezoidal rule estimate, even though it shouldn't be because it's not part of the area under the curve.Another application of parametric derivatives is the ability to determine the concavity for plane/parametric curves. In fact, this is specifically an application of the second parametric derivative for a set of parametric equations.. You were first introduced to concavity in Calculus 1, where you learned to determine the intervals of concavity for functions (in terms of x and y) to aid in ...1. When asked to find the interval on which the following curve is concave upward. y =∫x 0 1 94 + t +t2 dt y = ∫ 0 x 1 94 + t + t 2 d t. What is basically being asked to be done here? Evaluate the integral between [0, x] [ 0, x] for some function and then differentiate twice to find the concavity of the resulting function? calculus.From the table, we see that f has a local maximum at x = − 1 and a local minimum at x = 1. Evaluating f(x) at those two points, we find that the local maximum value is f( − 1) = 4 and the local minimum value is f(1) = 0. Step 6: The second derivative of f is. f ″ (x) = 6x. The second derivative is zero at x = 0.Subject classifications. A function f (x) is said to be concave on an interval [a,b] if, for any points x_1 and x_2 in [a,b], the function -f (x) is convex on that interval (Gradshteyn and Ryzhik 2000).Popular Calculators. Fractions Radical Equation Factoring Inverse Quadratic Simplify Slope Domain Antiderivatives Polynomial Equation Log Equation Cross Product Partial Derivative Implicit Derivative Tangent Complex Numbers. Symbolab: equation search and math solver - solves algebra, trigonometry and calculus problems step by step.The fact that its derivative, \(f'\text{,}\) is decreasing makes \(f\) concave down on the interval shown. Figure 1.87 At left, a function that is concave up; at right, one that is concave down. We state these most recent observations formally as the definitions of the terms concave up and concave down. ConcavitySolution. We see that the function is not constant on any interval. The function is increasing where it slants upward as we move to the right and decreasing where it slants downward as we move to the right. The function appears to be increasing from \displaystyle t=1 t = 1 to \displaystyle t=3 t = 3 and from \displaystyle t=4 t = 4 on.As the ball traces the curve from left to right, identify intervals using "interval notation" as either increasing or decreasing. f x = x x − 2 x + 4 x − 4 x + 4. a = −5.44.Free Linear Approximation calculator - lineary approximate functions at given points step-by-stepExample from p. 320, #3.[latex]f'(x)[/latex] is positive and [latex]f''(x)[/latex] is negative, so we can conclude that the function is increasing and concave down on this interval. We can also calculate that [latex]f(0)=0[/latex], giving us a base point for the graph. Using this information, we can conclude the graph must look like this: Figure 4.21 Check the second derivative test to know the concavity of the function at that point. What is a critical point in a function? A critical point of a function is a point where the derivative of the function is either zero or undefined. Intervals of Concavity Date_____ Period____ For each problem, find the x-coordinates of all points of inflection, find all discontinuities, and find the open intervals where the function is concave up and concave down. 1) y = x3 − 3x2 + 4 x y −8 −6 −4 −2 2 4 6 8 −8 −6 −4 −2 2 4 6 8The Integral Calculator solves an indefinite integral of a function. You can also get a better visual and understanding of the function and area under the curve using our graphing tool. Integration by parts formula: ? u d v = u v-? v d u. Step 2: Click the blue arrow to submit. Choose "Evaluate the Integral" from the topic selector and click to ...How to use the confidence interval calculator? Data is: Average, SD , n - enter the average, the standard deviation, and the sample size (n). Raw data - enter the delimited data, separated by comma, space or enter. In this case the tool will calculate the average, the standard deviation, and the sample size. Outliers: - this option is relevant ...A. The function is concave upward on the interval(s) and concave downward on the interval(s) . (Type your answers in interval notation. Use integers or fractions for any numbers in the expressions. Use a comma to separate answers as needed.) B. The function is concave downward on the interval(s) . The function is never concave upward.A function is said to be concave on an interval if, for any points and in , the function is convex on that interval (Gradshteyn and Ryzhik 2000). See also Convex Function Explore with Wolfram|Alpha. More things to try: Bolzano's theorem 12-wheel graph; domain of sqrt(sin(x)) ReferencesFirst, recall that the area of a trapezoid with a height of h and bases of length b1 and b2 is given by Area = 1 2h(b1 + b2). We see that the first trapezoid has a height Δx and parallel bases of length f(x0) and f(x1). Thus, the area of the first trapezoid in Figure 2.5.2 is. 1 2Δx (f(x0) + f(x1)).First, recall that the area of a trapezoid with a height of h and bases of length b1 and b2 is given by Area = 1 2h(b1 + b2). We see that the first trapezoid has a height Δx and parallel bases of length f(x0) and f(x1). Thus, the area of the first trapezoid in Figure 2.5.2 is. 1 2Δx (f(x0) + f(x1)).concavity. Have a question about using Wolfram|Alpha? Contact Pro Premium Expert Support ». Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history, geography, engineering, mathematics, linguistics, sports, finance, music….Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more. 1.8 Positive and negative intervals. Save Copy ... Negative Interval. 7. − 1 < x < 1. 8 ...Part B (AB or BC): Graphing calculator not allowed Question 4 9 points . General Scoring Notes. ... f is defined on the closed interval [−2, 8] and satisfies f (2 1. ... The first point was earned with correct presentation of the intervals of 2 concavity. The second point was earned with correct reasoning thatf (x) = x³ is increasing on (-∞,∞). A function f (x) increases on an interval I if f (b) ≥ f (a) for all b > a, where a,b in I. If f (b) > f (a) for all b>a, the function is said to be strictly increasing. x³ is not strictly increasing, but it does meet the criteria for an increasing function throughout it's domain = ℝ.A coordinate plane. The x-axis scales by one, and the y-axis scales by zero point five. The graph of y equals h of x is a continuous curve. From left to right, it passes through the point negative four, zero point seven-five and the x-intercept negative three, zero.Find the intervals on which the graph of f is concave upward, the intervals on which the graph of f is concave downward and the inflection points. f (x) = ln (x 2 − 4 x + 29) For what interval(s) of x is the graph of f concave upward? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A.For problems 7-15, calculate each of the following: (a) The intervals on which f(x) is increasing (b) The intervals on which f(x) is decreasing (c) The intervals on which f(x) is concave up (d) The intervals on which f(x) is concave down (e) All points of in ection. Express each as an ordered pair (x;y) 7. f(x) = x3 2x+ 3 a. 1 ; r 2 3! [r 2 3;1 ...f(x) is concave up on the interval (-1,1) and concave down on (-oo,-1) uu (1, oo). Start by calculating the first derivative of f(x) - use the quotient rule d/dx(f(x ...Free Pre-Algebra, Algebra, Trigonometry, Calculus, Geometry, Statistics and Chemistry calculators step-by-stepLet's look at the sign of the second derivative to work out where the function is concave up and concave down: For \ (x. For x > −1 4 x > − 1 4, 24x + 6 > 0 24 x + 6 > 0, so the function is concave up. Note: The point where the concavity of the function changes is called a point of inflection. This happens at x = −14 x = − 1 4. Analyze concavity. g ( x) = − 5 x 4 + 4 x 3 − 20 x − 20 . On which intervals is the graph of g concave up? Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone ... Now you make a test interval from: #(-oo,0)uu(0,3)uu(3,oo)# You test values from the left and right into the second derivative but not the exact values of #x#. If you get a negative number then it means that at that interval the function is concave down and if it's positive its concave up. If done so correctly you should get that:The Concavity Calculator is a useful tool for anyone studying calculus, or anyone who needs to analyze the curvature of a function. It is a quick and easy way to calculate the concavity of a function over a given interval, and it provides clear and concise results that are easy to understand. By using the Concavity Calculator, you can save time ...Equations Inequalities Scientific Calculator Scientific Notation Arithmetics Complex Numbers Polar/Cartesian Simultaneous Equations System of Inequalities Polynomials Rationales Functions Arithmetic & Comp. Coordinate Geometry Plane Geometry Solid Geometry Conic ... increasing and decreasing intervals. en. Related Symbolab blog posts. My ...As a result, Wolfram|Alpha also has separate algorithms to show algebraic operations step by step using classic techniques that are easy for humans to recognize and follow. This includes elimination, substitution, the quadratic formula, Cramer's rule and many more. Free Online Equation Calculator helps you to solve linear, quadratic and ...f(x) is concave up on the interval (-1,1) and concave down on (-oo,-1) uu (1, oo). Start by calculating the first derivative of f(x) - use the quotient rule d/dx(f(x ...Nov. 11, 2025. Thanksgiving. Nov. 27, 2025. Christmas. Dec. 25, 2025. This free date calculator computes the difference between two dates. It can also add to or subtract from a date. Both can deal with business days and holidays.Find the intervals of concavity and any inflection points, for: f ( x) = 2 x 2 x 2 − 1. Solution. Click through the tabs to see the steps of our solution. In this example, we are going to: Calculate the derivative f ″. Find where f ″ ( x) = 0 and f ″ DNE. Create a sign chart for f ″.To find the domain of a function, consider any restrictions on the input values that would make the function undefined, including dividing by zero, taking the square root of a negative number, or taking the logarithm of a negative number.It can also be written as simply the range of values. For example, the following are all equivalent confidence intervals: 20.6 ±0.887. or. 20.6 ±4.3%. or [19.713 - 21.487] Calculating confidence intervals: This calculator computes confidence intervals for normally distributed data with an unknown mean, but known standard deviation.You can use this grouped frequency distribution calculator to identify the class interval (or width) and subsequently generate a grouped frequency table to represent the data. How to use the calculator: Enter the data values separated by commas, line breaks, or spaces. Enter the details of the required number of intervals, and click on the ...👉 Learn how to determine the extrema, the intervals of increasing/decreasing, and the concavity of a function from its graph. The extrema of a function are ...

Flesch Kincaid Calculator. This Flesch Kincaid Calculator can be used to show how readable your text is by providing a Flesch Readability Ease score and the Flesch-Kincaid Grade Level score. Instructions: Cut-and-paste the text you want to test into the box below, then click "Calculate"; this will give you the text's readability scores.. Wtnh weather forecast

concave interval calculator

Thanks to all of you who support me on Patreon. You da real mvps! $1 per month helps!! :) https://www.patreon.com/patrickjmt !! Concavity and Second Deriv...Free Number Line calculator - visually show different values on the number lineQuestion: Consider the following. (If an answer does not exist, enter DNE.) f (x)=ex+9ex Find the interval (s) on which f is concave up. (Enter your answer using interval notation.) Find the interval (s) on which f is concave down. (Enter your answer using interval notation.) Find the inflection point of f. (x,y)= (. There are 3 steps to solve ...You can find the intervals of a function in two ways: with a graph, or with derivatives. Find function intervals using a graph. Example Question: Find the increasing intervals for the function g(x) = (&frac13;)x 3 + 2.5x 2 - 14x + 25 . Step 1: Graph the function (I used the graphing calculator at Desmos.com). This is an easy way to find ...Free piecewise functions calculator - explore piecewise function domain, range, intercepts, extreme points and asymptotes step-by-stepdefined on a closed interval a ≤ x ≤ b, and the problem is to find the maximum or minimum value of the function on the interval. This can occur only at one of the following points: the endpoints, a, b, any point in the interval at which f does not have a derivative, or any point c in the interval at which f0(c) = 0. These are the critical ...Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more.For the inequality to interval notation converter, first choose the inequality type: One-sided; Two-sided; or. Compound, and then choose the exact form of the inequality you wish to convert to interval notation. The last bit of information that our inequality to interval notation calculator requires to work properly is the value (s) of endpoint ...To calculate the direction of the vector v = (x, y), use the formula θ = arctan (y/x), where θ is the smallest angle the vector forms with the horizontal axis, and x and y are the components of the resultant vector. Calculate the direction of any vector in terms of the angle it forms with the x-axis.An inflection point is defined as a point on the curve in which the concavity changes. (i.e) sign of the curvature changes. We know that if f " > 0, then the function is concave up and if f " < 0, then the function is concave down. If the function changes from positive to negative, or from negative to positive, at a specific point x = c ...Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more.Compound interest is calculated using the compound interest formula: A = P (1+r/n)^nt. For annual compounding, multiply the initial balance by one plus your annual interest rate raised to the power of the number of time periods (years). This gives a combined figure for principal and compound interest. Analyze concavity. g ( x) = − 5 x 4 + 4 x 3 − 20 x − 20 . On which intervals is the graph of g concave up? Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone ... Free derivative calculator - differentiate functions with all the steps. Type in any function derivative to get the solution, steps and graphQuestion: 96. Logarithms and concavity. a. Calculate the average rate of change of the function f (x) = ln z on the intervals (1, 2) and (10,11). a b. Use a calculator to compare your answers in part a. Explain how the result is consistent with the concavity of the graph of the natural logarithm.Free definite integral calculator - solve definite integrals with all the steps. Type in any integral to get the solution, free steps and graphNov. 11, 2025. Thanksgiving. Nov. 27, 2025. Christmas. Dec. 25, 2025. This free date calculator computes the difference between two dates. It can also add to or subtract from a date. Both can deal with business days and holidays.Find the directrix of the parabola. You can either use the parabola calculator to do it for you, or you can use the equation: y = c - (b² + 1)/ (4a) = -4 - (9+1)/8 = -5.25. If you want to learn more coordinate geometry concepts, we recommend checking the average rate of change calculator and the latus rectum calculator..

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