Exam 5: Applications of the Derivative

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Let f(x)=15x395x2+3x15f ( x ) = \frac { 1 } { 5 } x ^ { 3 } - \frac { 9 } { 5 } x ^ { 2 } + 3 x - \frac { 1 } { 5 } The set of all critical numbers of ƒ is

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D

Let A=(10+x)2A = ( 10 + x ) ^ { 2 } If dxdt=215\frac { d x } { d t } = \frac { 2 } { 15 } when then dAdt\frac { d A } { d t } is

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C

The antiderivative of f(x)=63x4f ( x ) = 6 - 3 x ^ { - 4 } is

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B

An isosceles triangle has equal sides 4 cm long and the included angle ?. If dθdt=2rad/min\frac { d \theta } { d t } = 2 \mathrm { rad } / \mathrm { min } when θ=π3,\theta = \frac { \pi } { 3 }, then the rate of change of the area in cm2/min is

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Let s2=x2+9s ^ { 2 } = x ^ { 2 } + 9 If dxdt=4\frac { d x } { d t } = 4 when x=4,x = 4 , then dsdt\frac { d s } { d t } is

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Let y=f(x)y = f ( x ) be a differentiable function for which the graph of its derivative, ƒ ', is given below: On what interval(s) is the graph of f decreasing?

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Let f(x)=x3x2x+8f ( x ) = x ^ { 3 } - x ^ { 2 } - x + 8 on [2,2][ - 2,2 ] The absolute minimum and maximum of ƒare located respectively at x =

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Let V=316πh3V = \frac { 3 } { 16 } \pi h ^ { 3 } If dVdt=72\frac { d V } { d t } = - 72 when h=12h = 12 then dhdt\frac { d h } { d t } is

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Let f(x)=x3x2x+8f ( x ) = x ^ { 3 } - x ^ { 2 } - x + 8 Then ƒ has a relative maximum at x =

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A spherical balloon is inflated at the rate of 10 m3/min when the radius is 3 m. The rate of increase of the surface area of the balloon is

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Determine which of the following is not true for the graph of f(x)=x21x1f ( x ) = \frac { x ^ { 2 } - 1 } { x - 1 }

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Determine which of the following is not true for the graph of f(x)=x13f ( x ) = x ^ { \frac { 1 } { 3 } }

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Determine the value of the limit limx0ln(secx)x2\lim _ { x \rightarrow 0 } \frac { \ln ( \sec x ) } { x ^ { 2 } } ?

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Let f(x)=15x395x2+3xf ( x ) = \frac { 1 } { 5 } x ^ { 3 } - \frac { 9 } { 5 } x ^ { 2 } + 3 x Then ƒ has a point of inflection at x =

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A cardboard poster containing 32 square inches of printed region is to have a margin of 2 inches at the top and bottom and 0.75 inch at the sides. The dimensions of the smallest piece of cardboard that can be used to make the poster are

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Let f(x)=x42x3+1f ( x ) = x ^ { 4 } - 2 x ^ { 3 } + 1 The set of all critical numbers of ƒ is

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Let f(x)=14x432x2+8f ( x ) = \frac { 1 } { 4 } x ^ { 4 } - \frac { 3 } { 2 } x ^ { 2 } + 8 Then ƒ has a point of inflection at x =

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Let f(x)=x3+4x+1f ( x ) = x ^ { 3 } + 4 x + 1 Then ƒ has a point of inflection at x =

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Let sin2x+cos2y=54\sin ^ { 2 } x + \cos ^ { 2 } y = \frac { 5 } { 4 } If dydt=32\frac { d y } { d t } = - \frac { \sqrt { 3 } } { 2 } when x=2π3x = \frac { 2 \pi } { 3 } and y=3π4,y = \frac { 3 \pi } { 4 }, then dxdt\frac { d x } { d t } is

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Let f(x)=x23x on [0,3]f ( x ) = x ^ { 2 } - 3 x \text { on } [ 0,3 ] on [0,3][ 0,3 ] . Then the set of all c in (0,3) guaranteed by Rolle's Theorem is

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