Exam 2: The Derivative

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A rock is dropped from a height of 400 feet and falls toward the earth in a straight line. In t seconds, the rock drops a distance of s = 16t2 feet. What is the average velocity of the rock while it is falling? Use limits to find the instantaneous velocity of the rock when it hits the ground.

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Let Let   . Find the average rate of change of y with respect to x over the interval [3, 5]. . Find the average rate of change of y with respect to x over the interval [3, 5].

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If If   ,  , If   ,

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Find f '(x) where Find f '(x) where   . .

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Find the average rate of change of y with respect to x for Find the average rate of change of y with respect to x for   over the interval [1, 8]. over the interval [1, 8].

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Answer true or false. If f, g, and h are differentiable functions, and h ≠\neq 0 anywhere on its domain, then  Answer true or false. If f, g, and h are differentiable functions, and h  \neq  0 anywhere on its domain, then   . .

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If y = x8 + 4x3, find If y = x<sup>8</sup> + 4x<sup>3</sup>, find   . .

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Find f '(x) if f(x) = cos x tan x.

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Answer true or false. A graphing utility will show that Answer true or false. A graphing utility will show that   is differentiable at x = -1. is differentiable at x = -1.

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Find the instantaneous rate of change of f(x) = -2x4 - 11 at x0 = 2.

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A rock at an elevation angle of θ\theta is falling in a straight line. If at a given instant it has an angle of elevation of θ\theta =  A rock at an elevation angle of  \theta  is falling in a straight line. If at a given instant it has an angle of elevation of  \theta  =   and is a horizontal distance s from an observer, find the rate at which the rock is falling with respect to  \theta . and is a horizontal distance s from an observer, find the rate at which the rock is falling with respect to θ\theta .

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Find  Find   if y =  \alpha  <sup>11</sup> . (Alpha is a constant.) if y = α\alpha 11 . (Alpha is a constant.)

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g(x) = x4f(x). Find g'(4), given that f(4) = 3 and f '(4) = 6.

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Find Find   if y =   . if y = Find   if y =   . .

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y = x3 cos(3x). Find dy/dx.

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Find y'''(3) if y = x5.

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The surface area of a sphere is given by S = 4 π\pi r2 where r is the radius of the sphere. Use the method of Section 3.2 to find the instantaneous rate of change of S with respect to r when r = 2.

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Find (f ∘\circ g)'(3) if f '(3) = 5, g(3) = 3 and g '(3) = 2.

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Use a graphing utility to show that Use a graphing utility to show that   does not have a derivative at x = 0. does not have a derivative at x = 0.

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Sketch the graph of the derivative of the function whose graph is shown. Sketch the graph of the derivative of the function whose graph is shown.

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