Exam 11: Techniques of Differentiation

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Calculate dy dx\frac { \mathrm { d } y } { \mathrm {~d} x } . y=x2(3x+2)(5x+2)y = x ^ { 2 } ( 3 x + 2 ) ( 5 x + 2 )

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B

Find dy dx\frac { \mathrm { d } y } { \mathrm {~d} x } using implicit differentiation. exy=4e ^ { x } y = 4 ?

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D

Find the derivative of the function. g(x)=6x3+2x5g ( x ) = 6 x ^ { - 3 } + 2 x ^ { - 5 }

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E

Find dx dy\frac { \mathrm { d } x } { \mathrm {~d} y } using implicit differentiation. (xy)2+y2=5( x y ) ^ { 2 } + y ^ { 2 } = 5

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The Thoroughbred Bus Company finds that its monthly costs for one particular year were given by C(t)=100+t2C ( t ) = 100 + t ^ { 2 } dollars after t months. After t months, the company had P(t)=1,000+t2P ( t ) = 1,000 + t ^ { 2 } passengers per month. How fast was its cost per passenger changing after 4 months Round your answer to the nearest cent.

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Find the indicated derivative. y=19x3+13xy = 19 x ^ { 3 } + \frac { 13 } { x } , x=14x = 14 when t=1t = 1 , dx dtz=1=20\left. \frac { \mathrm { d } x } { \mathrm {~d} t } \right| _ { z = 1 } = 20 ; dy dtt=1=\left. \frac { \mathrm { d } y } { \mathrm {~d} t } \right| _ { t = 1 } = Please round the answer to the nearest hundredth.

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Find the slope of the tangent line to the graph of the given function at the indicated point. g(t)=8t3,(1.5,57)g ( t ) = \frac { 8 } { t ^ { 3 } } , ( 1.5,57 )

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Compute the indicated derivative using the chain rule. y=10x27x;dx dyx=2y = 10 x ^ { 2 } - 7 x ; \left. \frac { \mathrm { d } x } { \mathrm {~d} y } \right| _ { x = 2 }

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According to the equation given, a toy manufacturer calculates its daily profit P (in dollars) based on the number of workers n it employs. P=300n0.6n2P = 300 n - 0.6 n ^ { 2 } Calculate the marginal product at an employment level of 100 workers.

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Find the derivative of the function. f(x)=4x3f ( x ) = \frac { 4 } { x ^ { 3 } }

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Find the derivative of the function. ​ s(x)=4x+30xs ( x ) = 4 \sqrt { x } + \frac { 30 } { \sqrt { x } }

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Calculate dy dx\frac { \mathrm { d } y } { \mathrm {~d} x } . You need not expand your answer. ? y=(9x2+x)(xx2)y = \left( 9 x ^ { 2 } + x \right) \left( x - x ^ { 2 } \right)

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The Thoroughbred Bus Company finds that its monthly costs for one particular year were given by C(t)=100+t2C ( t ) = 100 + t ^ { 2 } dollars after t months. After t months, the company had P(t)=1,000+t2P ( t ) = 1,000 + t ^ { 2 } passengers per month. How fast was its cost per passenger changing after 6 months Enter your answer in dollars/month rounded to the nearest cent and without the units.

(Short Answer)
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Find dy dx\frac { \mathrm { d } y } { \mathrm {~d} x } using implicit differentiation. 10x+11y=xy10 x + 11 y = x y ?

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Find dy dx\frac { \mathrm { d } y } { \mathrm {~d} x } using implicit differentiation. xeyyex=12x e ^ { y } - y e ^ { x } = 12

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The population of Upper Anchora was 1,000,000 at the start of 1996 and was doubling every 9 years. How fast was it growing per year at the start of 1996 ? Round your answer to the nearest thousand.

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Calculate the derivative of the function. ​ f(x)=(x2+5x)3f ( x ) = \left( x ^ { 2 } + 5 x \right) ^ { 3 }

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Find the equation of the line tangent to the graph of the given function at the point x=1x = 1 . ​ f(x)=(x2+2)(x3+x)f ( x ) = \left( x ^ { 2 } + 2 \right) \left( x ^ { 3 } + x \right)

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The estimated marginal revenue for sales of ESU soccer team T-shirts is given by R(p)=(62p)ep2+7p5,000,000R ^ { \prime } ( p ) = \frac { ( 6 - 2 p ) e ^ { - p ^ { 2 } + 7 p } } { 5,000,000 } Where p is the price (in dollars) the soccer player charge for each shirt. Find R(2),R(3),R(5)R ^ { \prime } ( 2 ) , R ^ { \prime } ( 3 ) , R ^ { \prime } ( 5 ) . Select the correct answer rounded to four decimal places.

(Multiple Choice)
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A mold culture in a dorm refrigerator is circular and growing. The radius is increasing at a rate of 0.1 cm/day. How fast is the area growing when the culture is 6 centimeters in radius (The area of a disc of radius r is A=πr2A = \pi r ^ { 2 } .)

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