Exam 2: Limits and Derivatives

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Find the derivative of f(x)=4xf ( x ) = \sqrt { 4 - x } using the definition of the derivative.

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Use the Intermediate Value Theorem to show that x3 - 5x - 7 = 0 for some value of x in (2, 3).

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Suppose that f (x) is defined on [1, 3] and that f (1) = 3 and f (3) = 5. Sketch a possible graph of f that does not satisfy the conclusion of the Intermediate Value Theorem.

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Given the graph of y=f(x)y = f ^ { \prime } ( x ) , answer the questions that follow.  Given the graph of  y = f ^ { \prime } ( x )  , answer the questions that follow.   (a) Find all values of x at which (i) f is increasing.(iv)  f ^ { \prime \prime } ( x ) < 0  (vii)  f ^ { \prime } \text { is decreasing. }  (ii) f is decreasing.(v)  f ^ { \prime \prime } ( x ) = 0  (viii) f has a local maximum.(iii)  f ^ { \prime \prime } ( x ) > 0  (vi)  f ^ { \prime } \text { is increasing. }  (ix) f has a local minimum.(b) Sketch a graph which could represent y = f (x). (a) Find all values of x at which (i) f is increasing.(iv) f(x)<0f ^ { \prime \prime } ( x ) < 0 (vii) f is decreasing. f ^ { \prime } \text { is decreasing. } (ii) f is decreasing.(v) f(x)=0f ^ { \prime \prime } ( x ) = 0 (viii) f has a local maximum.(iii) f(x)>0f ^ { \prime \prime } ( x ) > 0 (vi) f is increasing. f ^ { \prime } \text { is increasing. } (ix) f has a local minimum.(b) Sketch a graph which could represent y = f (x).

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   -For the function whose graph is given above, determine  \lim _ { x \rightarrow - 2 } f ( x ) -For the function whose graph is given above, determine limx2f(x)\lim _ { x \rightarrow - 2 } f ( x )

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Given the graph of y=f(x)y = f ^ { \prime } ( x ) below, select a graph which could be that of y = f (x).  Given the graph of  y = f ^ { \prime } ( x )  below, select a graph which could be that of y = f (x).

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Let f (x) = {2x if x2x if 2<x2x24x+6 if x>2\left\{ \begin{array} { l l } \sqrt { - 2 - x } & \text { if } x \leq - 2 \\x & \text { if } - 2 < x \leq 2 \\x ^ { 2 } - 4 x + 6 & \text { if } x > 2\end{array} \right. . Find the following limits. Justify your answers.(a) limx2f(x)\lim _ { x \rightarrow - 2 ^ { - } } f ( x ) (b) limx2+f(x)\lim _ { x \rightarrow - 2 ^ { + } } f ( x ) (c) limx2f(x)lim _ { x \rightarrow - 2 } f ( x ) (d) limx2f(x)\lim _ { x \rightarrow 2 ^ { - } } f ( x ) (e) limx2+f(x)\lim _ { x \rightarrow 2 ^ { + } } f ( x ) (f) limx2f(x)\lim _ { x \rightarrow 2 } f ( x )

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Find the value of the limit limx7+3x4x\lim _ { x \rightarrow \infty } \frac { 7 + 3 x } { 4 - x }

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Given the graph of f below, state the intervals on which f is continuous. Given the graph of f below, state the intervals on which f is continuous.

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The following table shows the concentration (in mol/l) of a certain chemical in terms of reaction time (in hours) during a decomposition reaction. Time (hours) 0 5 10 20 30 50 Concentration (/) 2.32 1.86 1.49 0.98 0.62 0.25 (a) Find the average rate of change of concentration with respect to time for the following time intervals: (i) [0; 5] (ii) [10; 20] (iii) [30; 50] (b) Plot the points from the table and fit an appropriate exponential model to the data.(c) From your model in part (b), determine the instantaneous rate of change of concentration with respect to time.(d) Is the rate of change of concentration increasing or decreasing with respect to time? Justify your answer.

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Given the graph of y = f (x) below, select a graph which best represents the graph of y=f(x)y = f ^ { \prime } ( x )  Given the graph of y = f (x) below, select a graph which best represents the graph of  y = f ^ { \prime } ( x )     A)    B)   C)    D)   E)      F)   G)    H)    A)  Given the graph of y = f (x) below, select a graph which best represents the graph of  y = f ^ { \prime } ( x )     A)    B)   C)    D)   E)      F)   G)    H)    B)  Given the graph of y = f (x) below, select a graph which best represents the graph of  y = f ^ { \prime } ( x )     A)    B)   C)    D)   E)      F)   G)    H)    C)  Given the graph of y = f (x) below, select a graph which best represents the graph of  y = f ^ { \prime } ( x )     A)    B)   C)    D)   E)      F)   G)    H)    D)  Given the graph of y = f (x) below, select a graph which best represents the graph of  y = f ^ { \prime } ( x )     A)    B)   C)    D)   E)      F)   G)    H)    E)  Given the graph of y = f (x) below, select a graph which best represents the graph of  y = f ^ { \prime } ( x )     A)    B)   C)    D)   E)      F)   G)    H)    F)  Given the graph of y = f (x) below, select a graph which best represents the graph of  y = f ^ { \prime } ( x )     A)    B)   C)    D)   E)      F)   G)    H)    G)  Given the graph of y = f (x) below, select a graph which best represents the graph of  y = f ^ { \prime } ( x )     A)    B)   C)    D)   E)      F)   G)    H)    H)  Given the graph of y = f (x) below, select a graph which best represents the graph of  y = f ^ { \prime } ( x )     A)    B)   C)    D)   E)      F)   G)    H)

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For the function f whose graph is given, arrange the following values in increasing order and explain your reasoning. f(4),f(3),f(1),f(0),f(1),f(2),f(4)f ^ { \prime } ( - 4 ) , f ^ { \prime } ( - 3 ) , f ^ { \prime } ( - 1 ) , f ^ { \prime } ( 0 ) , f ^ { \prime } ( 1 ) , f ^ { \prime } ( 2 ) , f ^ { \prime } ( 4 )  For the function f whose graph is given, arrange the following values in increasing order and explain your reasoning.  f ^ { \prime } ( - 4 ) , f ^ { \prime } ( - 3 ) , f ^ { \prime } ( - 1 ) , f ^ { \prime } ( 0 ) , f ^ { \prime } ( 1 ) , f ^ { \prime } ( 2 ) , f ^ { \prime } ( 4 )

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The graph of f is given below. State, with reasons, the number(s) at which (a) f is not differentiable. (b) f is not continuous. The graph of f is given below. State, with reasons, the number(s) at which (a) f is not differentiable. (b) f is not continuous.

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 Average Daily Temperatures in Moorhead, Minnesota \text { Average Daily Temperatures in Moorhead, Minnesota } Month 1() 2() 3() 4() 5() 6() Temperature 6 14 26 43 57 66 Month 7() 8() 9() 10() 11() 12() Temperature 71 70 58 46 27 13 -During which of the following periods was the rate of change of the average daily temperature the smallest?

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A car on a test track accelerates from 0 ft/s to 208 ft/s in 8 seconds. The car’s velocity is given in the table below: t(s) 0 1 2 3 4 5 6 7 8 v(t)(ft/s) 0 18 47 77 104 132 163 184 208 -On what time interval does the car's average acceleration most closely approximate the average acceleration for the entire 8-second run?

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Given the graph of y = f (x) below, sketch the graph of y=f(x)y = f ^ { \prime } ( x ) .  Given the graph of y = f (x) below, sketch the graph of  y = f ^ { \prime } ( x )  .

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Find the value of x at which the curve y=x216x25x+4y = \frac { x ^ { 2 } - 16 } { x ^ { 2 } - 5 x + 4 } has a vertical asymptote.

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   -For the function whose graph is given above, determine  \lim _ { x \rightarrow 3 } f ( x )   -For the function whose graph is given above, determine limx3f(x)\lim _ { x \rightarrow 3 } f ( x )

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Given the graph of y = f (x) below, select a graph which best represents the graph of y=f(x)y = f ^ { \prime } ( x )  Given the graph of y = f (x) below, select a graph which best represents the graph of  y = f ^ { \prime } ( x )

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Explain why (3x2)(x4)x43x2, but limx4(3x2)(x4)x4=limx4(3x2)\frac { ( 3 x - 2 ) ( x - 4 ) } { x - 4 } \neq 3 x - 2 , \text { but } \lim _ { x \rightarrow 4 } \frac { ( 3 x - 2 ) ( x - 4 ) } { x - 4 } = \lim _ { x \rightarrow 4 } ( 3 x - 2 )

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