Exam 3: The Derivative and the Tangent Line Problem

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 Use implicit differentiation to find dydx\text { Use implicit differentiation to find } \frac { d y } { d x } \text {. } x3+5lny=4x ^ { 3 } + 5 \ln y = 4

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A projectile is shot upwards from the surface of the earth with an initial velocity of 108 meters per second. The position function is s(t)=4.9t2+v0t+s0s ( t ) = - 4.9 t ^ { 2 } + v _ { 0 } t + s _ { 0 } What is its velocity after 7 seconds?

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Find the rate of change of the distance between the origin and a moving point on the graph of y=x2+7y = x ^ { 2 } + 7 if dxdt=6\frac { d x } { d t } = 6 centimeters per second.

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A petrol car is parked 50 feet from a long warehouse (see figure). The revolving light on top of the car turns at a rate of 30 revolutions per minute. How fast is the light beam moving along the wall when the beam makes an angle of θ=45\theta = 45 ^ { \circ } with the perpendicular from the light to the wall.  A petrol car is parked 50 feet from a long warehouse (see figure). The revolving light on top of the car turns at a rate of 30 revolutions per minute. How fast is the light beam moving along the wall when the beam makes an angle of  \theta = 45 ^ { \circ }  with the perpendicular from the light to the wall.

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an equation of the tangent line to the graph of y=arcsin(7x) at the point y = \arcsin ( 7 x ) \text { at the point } (172,π4)\left( \frac { 1 } { 7 \sqrt { 2 } } , \frac { \pi } { 4 } \right)

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 Find the derivative of the function f(x)=ln(3xx2+4)\text { Find the derivative of the function } f ( x ) = \ln \left( \frac { 3 x } { x ^ { 2 } + 4 } \right) \text {. }

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 Use Newton’s Method to approximate the zero(s) of the function f(x)=x3+x+1\text { Use Newton's Method to approximate the zero(s) of the function } f ( x ) = x ^ { 3 } + x + 1 accurate to three decimal places.

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 Use logarithmic differentiation to find dydx\text { Use logarithmic differentiation to find } \frac { d y } { d x } \text {. } y=x8xy = x ^ { 8 x }

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 Find dydx by implicit differentiation given that tan(4x+y)=4x. Use the original \text { Find } \frac { d y } { d x } \text { by implicit differentiation given that } \tan ( 4 x + y ) = 4 x \text {. Use the original } equation to simplify your answer.

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 A buoy oscillates in simple harmonic motion y=Acos at as waves move past \text { A buoy oscillates in simple harmonic motion } y = A \cos \text { at as waves move past } it. The buoy moves a total of 3.53.5 feet (vertically) between its low point and its high point. It returns to its high point every 14 seconds. Write an equation describing the motion of the buoy if it is at its high point at t=0t = 0 .

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 Use implicit differentiation to find dydx\text { Use implicit differentiation to find } \frac { d y } { d x } 7exy+5y2=77 e ^ { x y } + 5 y ^ { 2 } = 7

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 Find the derivative of the function y=arctan(x7)+4x67(x2+4)\text { Find the derivative of the function } y = \arctan \left( \frac { x } { 7 } \right) + \frac { 4 x - 6 } { 7 \left( x ^ { 2 } + 4 \right) } \text {. }

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A manufacturer of digital audio players estimates that the profit for selling a particular model is P=76x3+4830x3320,000,00x60P = - 76 x ^ { 3 } + 4830 x ^ { 3 } - 320,000,00 \leq x \leq 60 , where PP is the profit in dollars and xx is the advertising expense in 10,000 's of dollars (see figure). Find the smaller of two advertising amounts that yield a profit PP of $2,100,000\$ 2,100,000 . Round your answer to the nearest dollar. Advertising expense (in 10,000 s of dollars)  A manufacturer of digital audio players estimates that the profit for selling a particular model is  P = - 76 x ^ { 3 } + 4830 x ^ { 3 } - 320,000,00 \leq x \leq 60 , where  P  is the profit in dollars and  x  is the advertising expense in 10,000 's of dollars (see figure). Find the smaller of two advertising amounts that yield a profit  P  of  \$ 2,100,000 . Round your answer to the nearest dollar. Advertising expense (in 10,000 s of dollars)

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f(x)=x2x+2f ( x ) = x - 2 \sqrt { x + 2 } Use Newton's Method to approximate the zero(s) of the function accurate to three decimal places.

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 If the annual rate of inflation averages 8% over the next 10 years, the approximate \text { If the annual rate of inflation averages } 8 \% \text { over the next } 10 \text { years, the approximate } cost CC of goods or services during any year in that decade is C(t)=P(1.08)tC ( t ) = P ( 1.08 ) ^ { t } where tt is the time in years and PP is the present cost. The price of an oil change for your car is presently $23.65\$ 23.65 . Find the rate of change of CC with respect to tt when t=3t = 3 . Round your answer to three decimal places.

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 Use the Product Rule to differentiate f(t)=t4sint\text { Use the Product Rule to differentiate } f ( t ) = t ^ { - 4 } \sin t \text {. }

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 The radius of a right circular cylinder is 3t+6 and its height is t5, where t is \text { The radius of a right circular cylinder is } \sqrt { 3 t + 6 } \text { and its height is } t ^ { 5 } \text {, where } t \text { is } time in seconds and the dimensions are in inches. Find the rate of change of the volume of the cylinder, V, with respect to time.

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Find the slope of the graph of the function at the given value. f(x)=2x2+6x2f ( x ) = - 2 x ^ { 2 } + \frac { 6 } { x ^ { 2 } } when x=5x = 5

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Use the alternative form of the derivative to find the derivative of the function f(x)=x29 at x=5f ( x ) = x ^ { 2 } - 9 \text { at } x = 5

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Given the derivative below find the requested higher-order derivative. ftt(x)=8x75,f(iv)(x)f ^ { tt } ( x ) = 8 x ^ { \frac { 7 } { 5 } } , f ^ { ( i v ) } ( x )

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