Question: If f (x) = exg, where g (0

> (a). Use the substitution θ = 5x to evaluate limx→0 sin 5x/x (b). Use part (a) and the definition of a derivative to find d/dx (sin 5x)

> Suppose that f (5) = 1, f'(5) = 6, g (5) = -3, and g'(5) = 2. Find the following values.

> Find the given derivative by finding the first few derivatives and observing the pattern that occurs.

> Differentiate. f (x) = √x sin x

> Find the given derivative by finding the first few derivatives and observing the pattern that occurs.

> (a). If f (x) = (x2 – 1) ex, find f'(x) and f"(x). (b). Check to see that your answers to part (a) are reasonable by comparing the graphs of f, f', and f".

> A ladder 10 ft long rests against a vertical wall. Let θ be the angle between the top of the ladder and the wall and let be the distance from the bottom of the ladder to the wall. If the bottom of the ladder slides away from the wall, how fast does x cha

> The edge of a cube was found to be 30 cm with a possible error in measurement of 0.1 cm. Use differentials to estimate the maximum possible error, relative error, and percentage error in computing (a) the volume of the cube and (b) the surface area of th

> (a). If f (x) = ex/ (2x2 + x + 1), find f'(x). (b). Check to see that your answer to part (a) is reasonable by comparing the graphs of f and f'.

> A mass on a spring vibrates horizontally on a smooth level surface (see the figure). Its equation of motion is x (t) = 8 sin t, where is in seconds and in centimeters. (a). Find the velocity and acceleration at time t. (b). Find the position, velocity,

> (a). The curve y = x/ (1 + x2) is called a serpentine. Find an equation of the tangent line to this curve at the point (3,0.3). (b). Illustrate part (a) by graphing the curve and the tangent line on the same screen.

> Let f (x) = x – 2 sin x, 0 < x < 2π. On what interval is f increasing?

> For what values of does the graph of have a horizontal tangent? f (x) = ex cos x

> (a). Use the definition of derivative to calculate f'. (b). Check to see that your answer is reasonable by comparing the graphs of f and f'. f (x) = x4 + 2x

> Suppose f (π/3) = 4 and f'(π/3) = -2, and let g (x) = f (x) sin x and h (x) = (cos x)/f (x). Find (a). g'(π/3) (b). h'(π/3)

> Differentiate. f (x) = sinx + 1/2 cot x

> (a). Use the Quotient Rule to differentiate the function f (x) = tan x- 1/sec x (b). Simplify the expression for f (x) by writing it in terms of sin x and cos x, and then find f'(x). (c). Show that your answers to parts (a) and (b) are equivalent.

> If f (t) = csc t, find f"(π/6).

> Trace or copy the graph of the given function f. (Assume that the axes have equal scales.) Then use the method of Example 1 to sketch the graph of f' below it.

> (a). If f (x) = ex cos x, find f'(x) and f"(x). (b). Check to see that your answers to part (a) are reasonable by graphing f, f', and f".

> (a). If f (x) = sec x - x, find f'(x). (b). Check to see that your answer to part (a) is reasonable by graphing both f and f' for |x| < π/2.

> (a). Find an equation of the tangent line to the curve y = 3x + 6 cos x at the point (π/3, π + 3). (b). Illustrate part (a) by graphing the curve and the tangent line on the same screen.

> (a). Find an equation of the tangent line to the curve y = 2x sin x at the point (π/2, π). (b). Illustrate part (a) by graphing the curve and the tangent line on the same screen.

> Find an equation of the tangent line to the curve at the given point. y = 1/sin x + cos x, (0, 1)

> Find an equation of the tangent line to the curve at the given point. y = x + c0s x, (0, 1)

> Find an equation of the tangent line to the curve at the given point. y = ex cox, (0, 1)

> Differentiate. y = 2csc x + 5 cos x

> Find an equation of the tangent line to the curve at the given point. y = sec x, (π/3, 2)

> Prove, using the definition of derivative, that if f (x) = csc x, then f'(x) = -sin x.

> The table gives the population of the world in the 20th century. (a). Estimate the rate of population growth in 1920 and in 1980 by averaging the slopes of two secant lines. (b). Use a graphing calculator or computer to find a cubic function (a third-d

> Prove that d/dx (cot x) = -csc2x.

> Prove that d/dx (sec x) = sec x tan x.

> Prove that d/dx (csc x) = -csc x cot x.

> Differentiate. y = x2 sin x tan x

> Differentiate. f (x) = xex csc x

> Differentiate. y = 1 – sec x/tan x

> Differentiate. f (θ) = sec θ/1 + sec θ

> Differentiate. y = 1 + sin x/x + cos x

> Differentiate. f (x) = 3x2 - 2 cos x

> Differentiate. F (y) = (1/y2 – 3/y4) (y + 5y3)

> Sketch the graph of a function that satisfies all of the given conditions.

> Differentiate. f (t) = 2t/ 4 + t2

> Differentiate. g (x) = 3x – 1/2x + 1

> Differentiate. y = ex/1 + x

> Differentiate. y = ex/x2

> If f is a differentiable function, find an expression for the derivative of each of the following functions.

> If is a differentiable function, find an expression for the derivative of each of the following functions.

> Use the definition of a derivative to find f'(x) and f''(x). Then graph f, f', and f'' on a common screen and check to see if your answers are reasonable. f (x) = 3x2 + 2x + 1

> If h (2) = 4 and h'(2) = -3, find d/dx (h (x)/x) |x-2

> Suppose that f (2) = -3, g (2) = 4, f'(2) = -2, and. g'(2) Find h'(2).

> In Example 6 we considered a bacteria population that doubles every hour. Suppose that another population of bacteria triples every hour and starts with 400 bacteria. Find an expression for the number of bacteria after hours and use it to estimate the ra

> If g (x) = x/ex, find g(n)(x).

> Differentiate. g (x) = √x ex

> If f (x) = x2/ (1 + x), find f"(1).

> The graph of f is given. State, with reasons, the numbers at which f is not differentiable.

> (a). If f (x) = (x3 – x) ex, find f'(x). (b). Check to see that your answer to part (a) is reasonable by comparing the graphs of f and f'.

> (a). The curve y = 1/ (1 + x2) is called a witch of Maria Agnesi. Find an equation of the tangent line to this curve at the point (-1, 1/2). (b). Illustrate part (a) by graphing the curve and the tangent line on the same screen.

> Find equations of the tangent line and normal line to the given curve at the specified point. y = √x/ x + 1, (4, 0.4)

> Find an equation of the tangent line to the given curve at the specified point. y = ex/x, (1, e)

> Differentiate. f (x) = (x3 + 2x) ex

> Find an equation of the tangent line to the given curve at the specified point. y = 2x/x + 1, (1, 1)

> Let f (x) = (x – 1)2 g (x) = e-2x and h (x) = 1 + ln (1 – 2x) (a). Find the linearizations of f, g, and h at a = 0. What do you notice? How do you explain what happened? (b). Graph f, g, and h and their linear approximations. For which function is the li

> Find f"(x) and f"(x). f (x) = x/x2 - 1

> Find f"(x) and f"(x). f (x) = x2 / 1 + 2x

> Find f"(x) and f"(x). f (x) = x5/2 ex

> Find f"(x) and f"(x). f (x) = x4 ex

> Differentiate. f (x) = ax + b/cx + d

> Differentiate. f (x) = x/x + c/x

> Differentiate. f (x) = 1 – xex/x + ex

> Differentiate. f (x) = A/B + Cex

> Differentiate. g (t) = t - √t/t1/3

> Find the derivative of the function in two ways: by using the Quotient Rule and by simplifying first. Show that your answers are equivalent. Which method do you prefer?

> Boyle’s Law states that when a sample of gas is compressed at a constant temperature, the product of the pressure and the volume remains constant: PV = C. (a). Find the rate of change of volume with respect to pressure. (b). A sample of gas is in a conta

> Differentiate. f (t) = 2t/2 + √t

> Differentiate. z = w3/2 (w + cew)

> Differentiate. y = v3 – 2v/v/v

> Differentiate. y = 1/s + kex

> Differentiate. y = (r2 - 2r) er

> Differentiate. y = t/ (t – 1)2

> Differentiate. y = t2 + 2/t4 – 3t2 + 1

> Differentiate. y = x + 1/ x3 + x -2

> Differentiate. y = x3/1 – x2

> Differentiate. R (t) = (t + et) (3 - √t)

> Newton’s Law of Gravitation says that the magnitude F of the force exerted by a body of mass m on a body of mass M is F = GmM/r2 where G is the gravitational constant and r is the distance between the bodies. (a). Find dF/dr and explain its meaning. What

> A particle moves according to a law of motion s = f (t), t > 0, where is measured in seconds and in feet. (a). Find the velocity at time t. (b). What is the velocity after 3 s? (c). When is the particle at rest? (d). When is the particle moving in the po

> Find the derivative of f (x) = (1 + 2x2) (x – x2) in two ways: by using the Product Rule and by performing the multiplication first. Do your answers agree?

> Differentiate the function. f (t) = 1/4 (t4 + 8)

> Differentiate the function. f (t) = 1/2t6 – 3t4 + t

> Differentiate the function. f (x) = x3 – 4x + 6

> Find the nth derivative of each function by calculating the first few derivatives and observing the pattern that occurs. (a). f (x) = xn (b). f (x) = 1/x

> Differentiate the function. F (x) = 3/4x8

> Differentiate the function. F (x) = (1/2x)5

> Differentiate the function. y = √x (x - 1)

> Differentiate the function. y = 3ex + 4/3√x

> Find an equation of the normal line to the parabola y = x2 – 5x + 4 that is parallel to the line x – 3y = 5.

> The quantity of charge in Q coulombs (C) that has passed through a point in a wire up to time t (measured in seconds) is given by Q (t) = t3 – 2t2 + 6t + 2. Find the current when (a) t = 0.5s and (b) t = 1s. [See Example 3. The unit of current is an ampe

> Differentiate the function. h (t) = 4√t – 4et

> Differentiate the function. g (t) = 2t-3/4

> Show that the function f (x) = |x – 6| is not differentiable at 6. Find a formula for f' and sketch its graph.

> Differentiate the function. f (t) = 2 – 2/3t