Question:

> Find a cubic function y = ax2 + bx2 + cx + d whose graph has horizontal tangents at the points (-2, 6) and (2, 6).

> If f is differentiable at a, where a > 0, evaluate the following limit in terms of f'(a): f(x) – f(a) lim VI - Va x,

> If f (x) = limt→x sec t – sec x/t - x, find the value of f'(π/4).

> Show that d/dx (sin2 x/ 1 + cot x + cos2x/1 + tan x) = -cos 2x

> Find numbers a and b such that limx→1 √ax + b – 2/x = 1

> Evaluate limx→1 3√x – 1/√x - 1

> Bézier curves are used in computer-aided design and are named after the French mathematician Pierre Bézier (1910–1999), who worked in the automotive industry. A cubic Bézier curve is determined by

> The tangent line approximation L (x) is the best first-degree (linear) approximation f (x) to near x = a because f (x) and L (x) have the same rate of change (derivative) at a. For a better approximation than a linear one, let’s try a s

> Certain combinations of the exponential functions, ex and e-x arise so frequently in mathematics and its applications that they deserve to be given special names. This project explores the properties of functions called hyperbolic functions. The hyperbol

> State each differentiation rule both in symbols and in words. (a). The Power Rule (b). The Constant Multiple Rule (c). The Sum Rule (d). The Difference Rule (e). The Product Rule (f). The Quotient Rule (g). The Chain Rule

> (a). Suppose the horizontal distance between P and Q is 100 ft. Write equations in a, b, and that will ensure that the track is smooth at the transition points. (b). Solve the equations in part (a) for a, b, and c to find a formula for f (x). (c). Plot L

> Suppose the curve y = x4 + ax3 + bx2 + cx + d has a tangent line when x = 0 with equation y = 2x + 1 and a tangent line when x = 1 with equation y = 2 – 3x. Find the values of a, b, c, and d.

> The solution in Problem 1 might look smooth, but it might not feel smooth because the piecewise defined function [consisting of L1 (x) for x 100] doesn’t have a continuous second derivative. So you decide to improve the design by using

> An approach path for an aircraft landing is shown in the figure and satisfies the following conditions: (i). The cruising altitude is h when descent starts at a horizontal distance from touchdown at the origin. (ii). The pilot must maintain a constant

> (a). What does it mean to say that the line x = a is a vertical asymptote of the curve y = f (x)? Draw curves to illustrate the various possibilities. (b). What does it mean to say that the line y = L is a horizontal asymptote of the curve y = f (x)? Dra

> Describe several ways in which a limit can fail to exist. Illustrate with sketches.

> (a). Define an antiderivative of f. (b). What is the antiderivative of a velocity function? What is the antiderivative of an acceleration function?

> (a). What does the sign of f'(x) tell us about f? (b). What does the sign of f"(x) tell us about f?

> Describe several ways in which a function can fail to be differentiable. Illustrate with sketches.

> (a). What does it mean for f to be differentiable at a? (b). What is the relation between the differentiability and continuity of a function? (c). Sketch the graph of a function that is continuous but not differentiable at a =2.

> Define the second derivative of f. If f (t) is the position function of a particle, how can you interpret the second derivative?

> Define the derivative f'(a). Discuss two ways of interpreting this number.

> Find the parabola with equation y = ax2 + bx whose tangent line at (1, 1) has equation y = 3x - 2.

> If y = f (x) and x changes from x1 to x2, write expressions for the following. (a). The average rate of change of y with respect to x over the interval [x1, x2]. (b). The instantaneous rate of change of y with respect to x at x = x1.

> State the following Limit Laws. (a). Sum Law (b). Difference Law (c). Constant Multiple Law (d). Product Law (e). Quotient Law (f). Power Law (g). Root Law

> State the derivative of each function. (a). y = xn (b). y = ex (c). y = ax (d). y = ln x (e). y = logax (f). y = sin x (g). y = cos x (h). y = tan x (i). y = y = csc x (j). y = sec x (k). y = cot x (l). y = sin-1 x (m). y = cos-1 x (n). y = tan-1 x

> Which of the following curves have vertical asymptotes? Which have horizontal asymptotes? (a). y = x4 (b). y = sin x (c). y = tan x (d). y = ex (e). y = ln x (f). y = 1/x (g). y = √x

> (a). What does it mean for f to be continuous at a? (b). What does it mean for f to be continuous on the interval (∞,∞)? What can you say about the graph of such a function?

> Write an expression for the linearization of, f at a.

> How do you find the slope of a tangent line to a parametric curve x = f (t), y = g (t)?

> (a). Explain how implicit differentiation works. When should you use it? (b). Explain how logarithmic differentiation works. When should you use it?

> (a). How is the number e defined? (b). Express e as a limit. (c). Why is the natural exponential function y = ex used more often in calculus than the other exponential functions y = ax? (d). Why is the natural logarithmic function y = ln x used more oft

> Explain what each of the following means and illustrate with a sketch. (a) lim f(x) = L (b) lim f(x) = L エ→ (c) lim f(r) = L エ→a (d) lim f(x) = 0 エ→ %3D (e) lim f(x) = L

> Find an equation of the tangent line to the curve y = x√x that is parallel to the line y = 1 + 3x.

> Find the limit. limr→9 √r/ (r -9)4

> Find the limit. limt→2 t2 – 4/t3 - 8

> Find the limit. limh→0 (h – 1)3 + 1/h

> Find the limit. limx→1 x2 – 9/x2 + 2x -3

> Find the limit. limx→-3 x2 – 9/x2 + 2x - 3

> Let C (t) be the total value of US currency (coins and banknotes) in circulation at time t. The table gives values of this function from 1980 to 2000, as of September 30, in billions of dollars. Interpret and estimate the value of C'(1990). t 1980 1

> Find the limit. limx→3 x2 -9/x2 + 2x -3

> The graph of f is shown. State, with reasons, the numbers at which f is not differentiable. y -1 4. 2.

> (a). If f (x) = √3 – 5x, use the definition of a derivative to find f'(x). (b). Find the domains of f and f'. (c). Graph f and f' on a common screen. Compare the graphs to see whether your answer to part (a) is reasonable.

> Trace or copy the graph of the function. Then sketch a graph of its derivative directly beneath. y.

> (a). In Section 2.8 we defined an antiderivative of f to be a function F such that F' = f. Try to guess a formula for an antiderivative of f (x) = x2. Then check your answer by differentiating it. How many antiderivatives does f have? (b). Find antideriv

> Trace or copy the graph of the function. Then sketch a graph of its derivative directly beneath. y

> Trace or copy the graph of the function. Then sketch a graph of its derivative directly beneath.

> Find a function f and a number a such that limh→0 (2+h)6 – 64/h = f'(a)

> (a). If f (x) = ex, estimate the value of f'(1) graphically and numerically. (b). Find an approximate equation of the tangent line to the curve y = e-x2 at the point where x = 1. (c). Illustrate part (b) by graphing the curve and the tangent line on the

> Find the limit. limx→1 ex3-x

> For the function f whose graph is shown, arrange the following numbers in increasing order: 0 1 f'(2) f'(3) f'(5) f"(5) -1 1

> The displacement (in meters) of an object moving in a straight line is given by s = 1 + 2t + 1/4t2, where is measured in seconds. (a). Find the average velocity over each time period. (b). Find the instantaneous velocity when t = 1. (i) [1, 3] (iii

> Prove that limx→0 x2 cos (1/x2) = 0.

> If 2x – 1 < f (x) < x2 for 0 < x < 3, find limx→1 f (x).

> When you turn on a hot-water faucet, the temperature T of the water depends on how long the water has been running. (a). Sketch a possible graph of T as a function of the time that has elapsed since the faucet was turned on. (b). Describe how the rate of

> Sketch the graph of an example of a function that satisfies all of the following conditions: f is continuous from the right at 3 lim f(x) = -2, lim f(x) = 0, lim f(x) = 0, %3D -3 lim f(x) = -0, lim f(x) = 2,

> Use graphs to discover the asymptotes of the curve. Then prove what you have discovered. y = cos2x/x2

> Find the limit. limx→1 (1/x – 1+ 1/x2 – 3x + 2)

> Find the limit. limx→∞ (√x2 + 4x + 1 - x)

> Find the limit. limx→∞ ex-x2

> Evaluate limx→0 ((√1 + tan x) – (√1 + sin x)/x3)

> Find f'(x) if it is known that d/dx [f (2x)] = x2

> Express the limit limθ→π/3 cos θ – 0.5/θ – π/3 as a derivative and thus evaluate it.

> A window has the shape of a square surmounted by a semicircle. The base of the window is measured as having width 60 cm with a possible error in measurement of 0.1 cm. Use differentials to estimate the maximum error possible in computing the area of the

> (a). Find the linearization of f (x) = 3√1 + 3x at a = 0. State the corresponding linear approximation and use it to give an approximate value for 3√1.03. (b). Determine the values of for which the linear approximation given in part (a) is accurate to wi

> Let f (x) = 3√x. (a). If a ≠ 0, use Equation 2.6.5 to find f'(a). (b). Show that f'(a) does not exist. (c). Show that y = 3√x has a vertical tangent line at (0, 0).

> The function C (t) = K (e-at – e-ht), where a, b, and K are positive constants and b > a, is used to model the concentration at time t of a drug injected into the bloodstream. (a). Show that limt→∞ C (t) = 0. (b). Find C"(t), the rate at which the drug i

> Find the limit. limx→∞ √x2 – 9/2x - 6

> The volume of a right circular cone is V = 1/3πr2h, where r is the radius of the base and h is the height. (a). Find the rate of change of the volume with respect to the height if the radius is constant. (b). Find the rate of change of the volume with re

> The mass of part of a wire is x (x + √x) kilograms, where x is measured in meters from one end of the wire. Find the linear density of the wire when x = 4 m.

> A particle moves along a horizontal line so that its coordinate at time t is x = √b2 + c2t2, t > 0, where and are positive constants. (a). Find the velocity and acceleration functions. (b). Show that the particle always moves in the positive direction.

> An equation of motion of the form s = Ae-ct cos (ωt + δ) represents damped oscillation of an object. Find the velocity and acceleration of the object.

> Find the limit. limx→-∞ 1 – 2x4 - x4/5 + x – 3x4

> Find the limit. limx→π- ln (sinx)

> (a). On what interval is the function f (x) = (ln x)/x increasing? (b). On what interval f is concave upward?

> Find the points on the ellipse x2 + 2y2 = 1 where the tangent line has slope 1.

> Find equations of both lines that are tangent to the curve y = 1 + x3 and parallel to the line 12x - y = 1.

> Graphs of the position functions of two particles are shown, where is measured in seconds. When is each particle speeding up? When is it slowing down? Explain. (a) SA (b) SA to ++ 1

> Find the limit. limx→3 √x + 6 – x/x3 - 3x2

> At what point on the curve y = [ln (x + 4)]2 is the tangent horizontal?

> Find h' in terms of f' and g'. h (x) = f (g (sin 4x)

> Find h' in terms of f' and g'. h (x) = f (x) g (x)/f (x) + g (x)

> Find f' in terms of g'. f (x) = g (ln x)

> Find f' in terms of g'. f (x) = ln |g (x)|

> Find f' in terms of g'. f (x) = eg (x)

> Find f' in terms of g'. f (x) = g (ex)

> Find f' in terms of g'. f (x) = g (g (x))

> Find f' in terms of g'. f (x) = [g (x)]2

> Find expressions for the first five derivatives of f (x) = x2ex. Do you see a pattern in these expressions? Guess a formula for f(n)(x) and prove it using mathematical induction.

> Find f' in terms of g'. f (x) = g (x2)

> Find f' in terms of g'. f (x) = x2g (x)

> If f and g are the functions whose graphs are shown, let P (x) = f (x) g (x), Q (x) = f (x)/g (x), and C (x) = f (g (x)). Find (a) P'(2), (b) Q'(2), and (c) C'(2). 9/ f

> Suppose that h (x) f (x) g (x) and F (x) = f (g (x)), where f (2) = 3, g (2) = 5, g'(2) = 4, f'(2) = -2, and f'(5) = 11. Find (a) h'(2) and (b) F'(2).

> (a). Graph the function f (x) = x – 2 sin x in the viewing rectangle [0, 8] by [-2, 8]. (b). On which interval is the average rate of change larger: [1, 2] 0r [2, 3]. (c). At which value of is the instantaneous rate of change larger: x = 2 or x = 5? (d).

> If f (x) =xesin x, find f'(x). Graph f and f' on the same screen and comment.

> Find the limit. limu→1 u4 – 1/u3 + 5u2 – 6u

> Find the limit. limv→14+ 4 – v/|4 – v|

> Find equations of the tangent line and normal line to the curve at the given point. x2 + 4xy + y2 = 13, (2, 1)

> Sketch the graph of a function that satisfies the given conditions: f(0) = 0, f'(-2) =f'(1) = f"(9) = 0, lim f(x) = 0, lim f(x) = -, %3D %3D f'(x) < 0 on (-0, -2), (1, 6), and (9, 0), f'(x) > 0 on (-2, 1) and (6, 9), f"(x) > 0 on (-0, 0) and (12, 0)

> (a). Find equations of both lines through the point (2, -3) that are tangent to the parabola y = x2 + x. (b). Show that there is no line through the point (2, 7) that is tangent to the parabola. Then draw a diagram to see why.