Find concave up and down calculator - 1.If f(x) is concave up in some interval around x= c, then L(x) underestimates in this interval. 2.If f(x) is concave down in some interval around x= c, then L(x) overestimates in this interval. Remember that an easy way to determine concavity is to evaluate the second derivative. For example, consider the six examples from the previous section.

 
Find step-by-step Biology solutions and your answer to the following textbook question: Determine where each function is increasing, decreasing, concave up, and concave down. With the help of a graphing calculator, sketch the graph of each function and label the intervals where it is increasing, decreasing, concave up, and concave down. Make sure that your graphs and your calculations agree .... Clay county jail inmates

Video Transcript. Consider the parametric curve π‘₯ is equal to one plus the sec of πœƒ and 𝑦 is equal to one plus the tan of πœƒ. Determine whether this curve is concave up, down, or neither at πœƒ is equal to πœ‹ by six. The question gives us a curve defined by a pair of parametric equations π‘₯ is some function of πœƒ and 𝑦 is ...Let'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 > βˆ’1 4 x > βˆ’ 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 = βˆ’14 x = βˆ’ 1 4.Question: For the following exercises, determine a. intervals where ff is increasing or decreasing, b. local minima and maxima of f,f, c. intervals where ff is concave up and concave down, and d. the inflection points of f. 226. f(x)=x^4-6x^3 228. f(x)=x+x^2-x^3 For the following exercises, determine a. intervals where ff is increasing or decreasing, b. local minimaBecause 20x^2 is always positive, the sign of y'' is the same as the sign of 4x-3 (or build a sign table of sign diagram or whatever you have learned to call it, for y''). y'' is negative (so the graph of the function is concave down, for x<3/4 and y'' is posttive (so the graph of the function is concave up, for x > 3/4 The curve is concave ...Dec 21, 2020 Β· Figure 3.4.5: A number line determining the concavity of f in Example 3.4.1. The number line in Figure 3.4.5 illustrates the process of determining concavity; Figure 3.4.6 shows a graph of f and f β€³, confirming our results. Notice how f is concave down precisely when f β€³ (x) < 0 and concave up when f β€³ (x) > 0. Find any intervals of concave up/down and points of inflection. Clearly label each of these. (please show steps as I am quite stuck finding the correct answer) Question: Find any intervals of concave up/down and points of inflection. Clearly label each of these.Find the Concavity arctan (x) arctan (x) arctan ( x) Write arctan(x) arctan ( x) as a function. f (x) = arctan(x) f ( x) = arctan ( x) Find the x x values where the second derivative is equal to 0 0. Tap for more steps... x = 0 x = 0. The domain of the expression is all real numbers except where the expression is undefined.f00(x) > 0 β‡’ f0(x) is increasing = Concave up f00(x) < 0 β‡’ f0(x) is decreasing = Concave down Concavity changes = Inflection point Example 5. Where the graph of f(x) = x3 βˆ’1 is concave up, concave down? Consider f00(x) = 2x. f00(x) < 0 for x < 0, concave down; f00(x) > 0 for x > 0, concave up. - Typeset by FoilTEX - 17Determine the intervals on which the function is concave up or down and find the points of inflection. f (x) = 4 x 3 βˆ’ 7 x 2 + 4 (Give your answer as a comma-separated list of points in the form (*, *). Express numbers in exact form. Use symbolic notation and fractions where needed.) points of inflection: Determine the interval on which f is concave up. (Give your answer as an interval in ...Compute dy dt. dy dt = t βˆ’ 1. Use the following equation taken from the reference: dy dx = dy dt dx dt. Substitute our computations: dy dx = t βˆ’1 t +1. Use the following equation taken from the reference: d2y dx2 = d( dy dx) dt dx dt. To compute d(dy dx) dt, we use the quotient rule:Explanation: 1) If f β€³ ( a) = 0, then ( a, f ( a)) is a inflection point. Consider the function f (x)=4x3+4x2 +1. Find the largest open intervals on which the function is concave up or concave down. If there is more than one interval, enter your intervals from left to right as they appear on the real line. Enter INF for ∞ and-INF for βˆ’βˆž.Explanation: For the following exercises, determine a. intervals where f is increasing or decreasing, b. local minima and maxima off, c. intervals where f is concave up and concave down, and d. the inflection points of f. Sketch the curve, then use a calculator to compare your answer. If you cannot determine the exact answer analytically, use a ...Let f (x)-1- 2r3+8 6. Find the open intervals on which f is concave up (down) Then determine the r-coordinates of all infilection points of f 1. f is concave up on the intervals -1,0) 2. f is concave down on the intervals -inf-1) U (O,inf) 3. The inflection points occur at z0-1 Notes: In the first two, your answer should either be a single ...With just a few clicks, users can access a wide range of online calculators that can perform calculations in a variety of fields, including finance, physics, chemistry, and engineering. These calculators are often designed with user-friendly interfaces that are easy to use and provide clear and concise results. Concave Up Or Down Calculator.Concavity and convexity are opposite sides of the same coin. So if a segment of a function can be described as concave up, it could also be described as convex down. We find it convenient to pick a standard terminology and run with it - and in this case concave up and concave down were chosen to describe the direction of the concavity/convexity.Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more. Concavity | DesmosStep 1. Please answer the following questions about the function x = y =- Vertical asymptotes f. Horizontal asymptotes x = (c) Find any horizontal and vertical asymptotes of f is concave up, concave down, and has inflection points. Concave up on the intervalConcave down on the intervalInflection points x = (b) Find where x = Local minima x ... Informal Definition. Geometrically, a function is concave up when the tangents to the curve are below the graph of the function. Using Calculus to determine concavity, a function is concave up when its second derivative is positive and concave down when the second derivative is negative. How much you actually make per year or per hour at your job is a bit more complicated than estimating working hours and multiplying by the hourly wage in your contract. Once you ca...Concave Up Down Calculator. Concave Up Down Calculator - Web if f(x) > 0 for all x on an interval, f'(x) is increasing, and f(x) is concave up over the interval. Web concavity relates to the rate of change of a function's derivative. Our results show that the curve of f ( x) is concaving downward at the interval, ( βˆ’ 2 3, 2 3).Learning Objectives. Explain how the sign of the first derivative affects the shape of a function's graph. State the first derivative test for critical points. Use concavity and inflection points to explain how the sign of the second derivative affects the shape of a function's graph. Explain the concavity test for a function over an open ...intervals where [latex]f[/latex] is concave up and concave down, and; the inflection points of [latex]f[/latex]. Sketch the curve, then use a calculator to compare your answer. If you cannot determine the exact answer analytically, use a calculator.5.4 Concavity and inflection points. We know that the sign of the derivative tells us whether a function is increasing or decreasing; for example, when fβ€²(x) > 0 f β€² ( x) > 0 , f(x) f ( x) is increasing. The sign of the second derivative fβ€²β€²(x) f β€³ ( x) tells us whether fβ€² f β€² is increasing or decreasing; we have seen that if f ...Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this siteA function f is convex if f'' is positive (f'' > 0). A convex function opens upward, and water poured onto the curve would fill it. Of course, there is some interchangeable terminology at work here. "Concave" is a synonym for "concave down" (a negative second derivative), while "convex" is a synonym for "concave up" (a ...f (x) = x4 βˆ’ 8x2 + 8 f ( x) = x 4 - 8 x 2 + 8. Find the x x values where the second derivative is equal to 0 0. Tap for more steps... x = 2√3 3,βˆ’ 2√3 3 x = 2 3 3, - 2 3 3. The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.Concave Up Down Calculator. Concave Up Down Calculator - Web if f(x) > 0 for all x on an interval, f'(x) is increasing, and f(x) is concave up over the interval. Web concavity relates to the rate of change of a function's derivative. Our results show that the curve of f ( x) is concaving downward at the interval, ( βˆ’ 2 3, 2 3).we can therefore determine that: (1) By solving the equation: f '(x) = 0 β‡’ βˆ’2xeβˆ’x2 = 0. we can see that f (x) has a single critical point for x = 0, this point is a relative maximum since f ''(0) = βˆ’2 < 0. Looking at the second derivative, we can see that 2eβˆ’x2 is always positive and non null, so that inflection points and concavity ...29 Nov 2023 ... ... concave up for all intervals in ( 0 , + ∞ ) . Where do you think the concavity of the graph changed from concave down to concave up? If you ...Find the open intervals where the function is concave upward or concave downward. 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.Find the first derivative and calculate its critical points. 2. Apply a criterion of the first derivative: ... Create a number line to determine the intervals on which f is concave up or concave down. c. Find the critical point; F(x) = (x - 7)^1/3 + 5 I) Find the critical points, if they exist. II) Find the local maxima and or minima using the ...Question: For the following exercises, determine a. intervals where f is increasing or decreasing, b. local minima and maxima of f, C. intervals where f is concave up and concave down, and the inflection points of f d. 224. f (x) = x2-6x 225. f (x) = x3-6x2 226, f (x) = x4-6x5. 226. Here’s the best way to solve it.17 Nov 2015 ... To the find the intervals of concavity, we set the second derivative equal to zero. To find the second derivative, we derive f(x), then find ...O 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.) OB. The function is concave up on (-00,00). OC. The function is concave down on (-00,00) 19 μ ‘ Select the correct choice below and fill in any answer boxes within your choice. A.Concavity of Quadratic Functions. The concavity of functions may be determined using the sign of the second derivative. For a quadratic function f is of the form f (x) = a x 2 + b x + c , with a not equal to 0 The first and second derivatives of are given by f ' (x) = 2 a x + b f " (x) = 2 a The sign of f " depends on the sign of coefficient a ... Question: 4 Consider the function f(x)=ax3+bx where a>0. (a) Consider b>0. i. Find the x-intercepts. ii. Find the intervals on which f is increasing and decreasing. iii. Identify any local extrema. iv. Find the intervals on which f is concave up and concave down. (b) Consider b<0. i. Find the x-intercepts. ii. Find the intervals on which f is ... The Function Calculator is a tool used to analyze functions. It can find the following for a function: parity, domain, range, intercepts, critical points, intervals of increase/decrease, local and global extrema, concavity intervals, inflection points, derivative, integral, asymptotes, and limit. The calculator will also plot the function's graph.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: f(x) is concave up from (-oo,0)uu(3,oo) and that f(x) is concave down from (0,3) You should also note that the points f(0) and f(3) are inflection points.Concave up (also called convex) or concave down are descriptions for a graph, or part of a graph: A concave up graph looks roughly like the letter U. A concave down graph is shaped like an upside down U (β€œβ‹’β€). They …The graph is concave down when the second derivative is negative and concave up when the second derivative is positive. Concave down on (βˆ’βˆž,0) ( - ∞, 0) since f ''(x) f β€²β€² ( x) is …Answer link. mason m. Jan 22, 2016. For a quadratic function ax2 +bx + c, we can determine the concavity by finding the second derivative. f (x) = ax2 + bx +c. f '(x) = 2ax +b. f ''(x) = 2a. In any function, if the second derivative is positive, the function is concave up. If the second derivative is negative, the function is concave down.Find Concave Up And Down Calculator . Computerbasedmath one simple and interesting idea is that when we translate up and down the graph ...Free Functions Concavity Calculator - find function concavity intervlas step-by-stepFree online graphing calculator - graph functions, conics, and inequalities interactively31 Mar 2008 ... Concavity and Second Derivatives - Examples of using the second derivative to determine where a function is concave up or concave down. For ...Whether you’re planning a road trip or flying to a different city, it’s helpful to calculate the distance between two cities. Here are some ways to get the information you’re looki...Calculate [latex]f^{\prime \prime}[/latex]. Determine the intervals where [latex]f[/latex] is concave up and where [latex]f[/latex] is concave down. Use this information to determine whether [latex]f[/latex] has any inflection points. The second derivative can also be used as an alternate means to determine or verify that [latex]f[/latex] has a ...Use a number line to test the sign of the second derivative at various intervals. A positive f " ( x) indicates the function is concave up; the graph lies above any drawn tangent lines, and the slope of these lines increases with successive increments. A negative f " ( x) tells me the function is concave down; in this case, the curve lies ... When a function is concave up, the second derivative will be positive and when it is concave down the second derivative will be negative. Inflection points are where a graph switches concavity from up to down or from down to up. Inflection points can only occur if the second derivative is equal to zero at that point. About Andymath.com Informal Definition. Geometrically, a function is concave up when the tangents to the curve are below the graph of the function. Using Calculus to determine concavity, a function is concave up when its second derivative is positive and concave down when the second derivative is negative.Here’s the best way to solve it. 1. You are given a function f (x) whose domain is all real numbers. Describe in a short paragraph how you could sketch the graph without a calculator. Include how to find intervals where f is increasing or decreasing, how to find intervals where f is concave up or down, and how to find local extrema and points ...Determine the intervals on which the given function is concave up or down and find the point of inflection. If f(x) = x(x - 5(sqrt x)) ... On this interval, f is (concave up or down.) I'm struggling calculating the second derivative and isolating for x to find the inflection points, can someone walk me through this problem, please? Many thanks.Free Pre-Algebra, Algebra, Trigonometry, Calculus, Geometry, Statistics and Chemistry calculators step-by-stepWe can use the second derivative of a function to determine regions where a function is concave up vs. concave down. First Derivative Information ... 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 ...(W) Consider the function f (x) = a x 3 + b x where a > 0. (a) Consider b > 0. (i) Find the x-intercepts.(ii) Find the intervals on which f is increasing and decreasing. (iii) Identify any local extrema. (iv) Find the intervals on which f is concave up and concave down. (b) Consider b < 0. (i) Find the x-intercepts.(ii) Find the intervals on which f is increasing and decreasing.Free Pre-Algebra, Algebra, Trigonometry, Calculus, Geometry, Statistics and Chemistry calculators step-by-stepIncreasing, 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.Moreover, the point (0, f(0)) will be an absolute minimum as well, since f(x) = x^2/(x^2 + 3) > 0,(AA) x !=0 on (-oo,oo) To determine where the function is concave up and where it's concave down, analyze the behavior of f^('') around the Inflection points, where f^('')=0. f^('') = -(18(x^2-1))/(x^2 + 3)^2=0 This implies that -18(x^2-1) = 0 ...Find the Intervals where the Function is Concave Up and Down f(x) = 14/(x^2 + 12)If you enjoyed this video please consider liking, sharing, and subscribing.U...Find functions domain step-by-step. function-domain-calculator. concave up. en. Related Symbolab blog posts. Functions. A function basically relates an input to an output, there's an input, a relationship and an output. For every input...Find the local maximum value(s). (Enter your answers as a comma-separated list.) (c) Find the inflection points. smaller x-value (x, y) = larger x-value (x, y) = Find the interval(s) where the function is concave up. (Enter your answer using interval notation.) Find the interval(s) where the function is concave down.Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more.Percentages may be calculated from both fractions and decimals. While there are numerous steps involved in calculating a percentage, it can be simplified a bit. Multiplication is u...Free Pre-Algebra, Algebra, Trigonometry, Calculus, Geometry, Statistics and Chemistry calculators step-by-stepCalculus questions and answers. Consider the following function. f (x) = x3 ln (x) a.Use l'Hospital's Rule to determine the limit as x β†’ 0+ b. Use calculus to find the minimum value. c.Find the interval where the function is concave up. (Enter your answer in interval notation.) d.Find the interval where the function is concave down.FIGURE 1. FIGURE 2. We can find the intervals in which the graph of a function is concave up and the intervals where it is concave down by studying the function's second derivative: . Theorem 1 (The Second-Derivative Test for concavity) If f00(x) exists and is positive on an open interval, then the graph of y = f(x) is concave up on the ... Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor. 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 ... concave up. en. Related Symbolab blog posts. Practice Makes Perfect. Learning math ...When f'(x) is zero, it indicates a possible local max or min (use the first derivative test to find the critical points) When f''(x) is positive, f(x) is concave up When f''(x) is negative, f(x) is concave down When f''(x) is zero, that indicates a possible inflection point (use 2nd derivative test)The opposite of the dividend payout ratio, here's exactly how to calculate a company's plowback ratio. The opposite of the dividend payout ratio, a company&aposs plowback ratio is ...Calculus. Find the Concavity f (x)=x^4-6x^3. f (x) = x4 βˆ’ 6x3 f ( x) = x 4 - 6 x 3. Find the x x values where the second derivative is equal to 0 0. Tap for more steps... x = 0,3 x = 0, 3. The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression ...(W) Consider the function f (x) = a x 3 + b x where a > 0. (a) Consider b > 0. (i) Find the x-intercepts.(ii) Find the intervals on which f is increasing and decreasing. (iii) Identify any local extrema. (iv) Find the intervals on which f is concave up and concave down. (b) Consider b < 0. (i) Find the x-intercepts.(ii) Find the intervals on which f is increasing and decreasing.The Sign of the Second Derivative Concave Up, Concave Down, Points of Inflection. We have seen previously that the sign of the derivative provides us with information about where a function (and its graph) is increasing, decreasing or stationary.We now look at the "direction of bending" of a graph, i.e. whether the graph is "concave up" or "concave …For the following functions, (i) determine all open intervals where f(x) is increasing, decreasing, concave up, and concave down, and (ii) find all local maxima, local minima, and inflection points. Give all answers exactly, not as numerical approximations. (a) f(x) = x 5 βˆ’ 2x 3 for all x (b) f(x) = x βˆ’ 2 sin x for βˆ’2Ο€ < x < 2Ο€ Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more. Exercise 3.5E. 7. For the following exercises, determine. a. intervals where f is increasing or decreasing, b. local minima and maxima of f, c. intervals where f is concave up and concave down, and. d. the inflection points of f. 1) f(x) = x3 βˆ’ 4x2 + x + 2. Answer. 2) f(x) = x2 βˆ’ 6x.To determine the concavity of a function, you need to calculate its second derivative. If the second derivative is positive, then the function is concave up, and if it is negative, then the function is concave down. If the second derivative is zero, then the function is neither concave up nor concave down.where g(x) is concave up and concave down. -4 3. 2. 2 3 4. Find the x-coordinate of all points of inflection for the function g(x). x = - 21 0,1. Page 7. -4-3-2 ...Question: 8x^3+7 Find concave up and down. 8 x ^ 3 + 7 Find concave up and down. There are 4 steps to solve this one. Powered by Chegg AI. Step 1. Write 8 x 3 + 7 as a function. f (x) = 8 x 3 + 7. Find the x values where the second derivative is equal to 0. View the full answer. Step 2. Unlock. Step 3. Unlock. Step 4. Unlock. Find the inflection points and intervals of concavity up and down of. f(x) = 3x2 βˆ’ 9x + 6 f ( x) = 3 x 2 βˆ’ 9 x + 6. First, the second derivative is just fβ€²β€²(x) = 6 f β€³ ( x) = 6. Solution: Since this is never zero, there are not points of inflection. And the value of fβ€²β€² f β€³ is always 6 6, so is always > 0 > 0 , so the curve is ... This graph determines the concavity and inflection points for any function equal to f(x). Green = concave up, red = concave down, blue bar = inflection point. Expert-verified. (1 point) Determine the intervals on which the given function is concave up or down and find the points of inflection. Let f (x) = (2x2 - 4) e* Inflection Point (s) = The left-most interval is . The middle interval is , and on this interval f is Concave Up , and on this interval f is Concave Down Β» , and on this interval f ...

Concavity Calculator: Calculate the Concavity of a Function. Concavity is an important concept in calculus that describes the curvature of a function. A function is said to be concave up if it curves upward, and concave down if it curves downward. The concavity of a function can be determined by calculating its second derivative.This is where the Concavity Calculator comes in handy.. Bmv marietta

find concave up and down calculator

To 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 ...Concave down: If a function is concave up (like a parabola), what is 𝑓 Γ± is doing. If 𝑓 is concave up, then 𝑓 Γ± is increasing. If 𝑓 is concave down, then 𝑓 Γ± is decreasing. This leads us to the following… 𝑓 Γ± Γ± P0 means 𝑓 is concave up. 𝑓 Γ± Γ± O0 means 𝑓 is concave down. 1. Find the intervals of concavity for ...Find step-by-step Biology solutions and your answer to the following textbook question: Determine where each function is increasing, decreasing, concave up, and concave down. With the help of a graphing calculator, sketch the graph of each function and label the intervals where it is increasing, decreasing, concave up, and concave down. Make sure that your graphs and your calculations agree ...f(x) is concave on (-oo,-4.5) and (0,oo), and f(x) is convex on (-4.5,0). To find where a function is concave up, find where the second derivative of the function is positive. f(x)=-x^4-9x^3+2x+4 Find f'(x): f'(x)=-4x^3-27x^2+2 Next, find f''(x): f''(x)=-12x^2-54x f''(x)=(-6x)(2x+9) Set f''(x) equal to zero to find inflection points 0=(-6x)(2x+9) x=0, x=-4.5 After checking the signs of values ...Note that at stationary points of the expression, the curve is neither concave up nor concave down. In this case, 0 is a member of neither of the regions: In[5]:= Out[5]= To test that 0 is the only point where the second derivative is 0, use Resolve: In[6]:= Out[6]=Step 1. Use the first derivative and the second derivative test to determine where each function is increasing, decreasing, concave up, and concave down. y= - 3x2 - 5x + 2, XER Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The function is increasing on the interval (s) (Type your answer ...For f (x) = βˆ’ x 3 + 3 2 x 2 + 18 x, f (x) = βˆ’ x 3 + 3 2 x 2 + 18 x, find all intervals where f f is concave up and all intervals where f f is concave down. We now summarize, in Table 4.1 , the information that the first and second derivatives of a function f f provide about the graph of f , f , and illustrate this information in Figure 4.37 .Show Point of Inflection. Show Concave Up Interval. Show Concave Down Interval. 2) f(x) = 15x5 βˆ’ 16x + 5. Show Point of Inflection. Show Concave Up Interval. Show Concave Down Interval. 3) f(x) = βˆ’3x + 2. Show Point of Inflection.Symbolab is the best calculus calculator solving derivatives, integrals, limits, series, ODEs, and more. What is differential calculus? Differential calculus is a branch of calculus that includes the study of rates of change and slopes of functions and involves the concept of a derivative.you can also calculate the mean of each: print np.mean(data) print np.mean(velocity) print np.mean(acceleration) to make generalizations about the shape, for this sample set: >>> 4.22222222222 # average value 0.0 # generally sideways; no trend -0.571428571429 # concave mostly down and then the mean relative standard deviationThe second derivative tells whether the curve is concave up or concave down at that point. If the second derivative is positive at a point, the graph is bending upwards at that point. Similarly, if the second derivative is negative, the graph is concave down. This is of particular interest at a critical point where the tangent line is flat and ...5.4 Concavity and inflection points. We know that the sign of the derivative tells us whether a function is increasing or decreasing; for example, when fβ€²(x) > 0 f β€² ( x) > 0 , f(x) f ( x) is increasing. The sign of the second derivative fβ€²β€²(x) f β€³ ( x) tells us whether fβ€² f β€² is increasing or decreasing; we have seen that if f ....

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