Exam 2: Functions

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The graph of f(x)=x3f ( x ) = | x | - 3 is shown. Use this graph to sketch the graph of g(x)=x3g ( x ) = | | x | - 3 | .  The graph of  f ( x ) = | x | - 3  is shown. Use this graph to sketch the graph of  g ( x ) = | | x | - 3 |  .

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For the function f(x)=23x413x5x+3f ( x ) = \frac { 2 } { 3 } x ^ { 4 } - \frac { 1 } { 3 } x ^ { 5 } - x + 3 determine the average rate of change between the values x=1x = - 1 and x=1.x = 1 .

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Sketch the graph of the piecewise-defined function. f(x)={x+2 if x<02 if 0x1x+6 if 1<xf ( x ) = \left\{ \begin{array} { l l } x + 2 & \text { if } x < 0 \\2 & \text { if } 0 \leq x \leq 1 \\- x + 6 & \text { if } 1 < x\end{array} \right.

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Determine whether or not the function h(x)=3x6+2h ( x ) = 3 x ^ { 6 } + 2 , 0x0 \leq x \leq \infty is one-to-one.

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Use a graphing device to the graph of the function f(x)=x4+2x33x24x+4f ( x ) = x ^ { 4 } + 2 x ^ { 3 } - 3 x ^ { 2 } - 4 x + 4 . State approximately the intervals on which the function is increasing and on which the function is decreasing.

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Find the domain of the function h(x)=2x2+3x+1h ( x ) = \sqrt { 2 x ^ { 2 } + 3 x + 1 } .

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Graphs of the functions f and g are given. (a) Which is larger, f(0) or g(0)?f ( 0 ) \text { or } g ( 0 ) ? (b) Which is larger, f(1) or g(1)?f ( - 1 ) \text { or } g ( - 1 ) ? (c) For which values of x is f(x)=g(x)?f ( x ) = g ( x ) ?  Graphs of the functions f and g are given. (a) Which is larger,  f ( 0 ) \text { or } g ( 0 ) ?  (b) Which is larger,  f ( - 1 ) \text { or } g ( - 1 ) ?  (c) For which values of x is  f ( x ) = g ( x ) ?

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Determine whether or not the function given by the graph is one-to-one. Determine whether or not the function given by the graph is one-to-one.

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The graph of a function is given. Determine the average rate of change of the function between the indicated points on the graph. (2,8) (2,8)( - 2 , - 8 )  The graph of a function is given. Determine the average rate of change of the function between the indicated points on the graph.  (2,8)  ( - 2 , - 8 )         The graph of a function is given. Determine the average rate of change of the function between the indicated points on the graph.  (2,8)  ( - 2 , - 8 )         The graph of a function is given. Determine the average rate of change of the function between the indicated points on the graph.  (2,8)  ( - 2 , - 8 )

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Evaluate f(2)f ( - 2 ) , f(1)f ( - 1 ) , f(0)f ( 0 ) , f(1)f ( 1 ) , and f(5)f ( 5 ) for the piecewise-defined function. f(x)={3x2 if x<02x+1 if x0f ( x ) = \left\{ \begin{array} { l l } 3 x ^ { 2 } & \text { if } x < 0 \\2 x + 1 & \text { if } x \geq 0\end{array} \right.

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Express the function H(x)=(2+x2)3H ( x ) = \left( 2 + x ^ { 2 } \right) ^ { 3 } in the form fgf \circ g .

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Let f(x)=x3+cf ( x ) = x ^ { 3 } + c . Graph the family of functions with c=4c = - 4 , 2- 2 , 00 , 22 , and 44 in the viewing rectangle [5,5][ - 5,5 ] by [5,5][ - 5,5 ] . How does the value of cc affect the graph?

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A function is given. (a) Find all the local maximum and minimum values of the function and the value of x at which each occurs. (b) Find the intervals on which the function is increasing and on which the function is decreasing. State all answers correct to two decimal places. U(x)=2(x3x)U ( x ) = 2 \left( x ^ { 3 } - x \right)

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Use f(x)=x4f ( x ) = x - 4 and g(x)=2x2g ( x ) = 2 - x ^ { 2 } to evaluate the expression g(g(1))g ( g ( 1 ) ) .

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Determine whether or not the function given by the graph is one-to-one. Determine whether or not the function given by the graph is one-to-one.

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The graph of a function h is given. (a) Find h(3),h(2),h(2), and h(4)h ( - 3 ) , h ( - 2 ) , h ( 2 ) , \text { and } h ( 4 ) (b) Find the domain and range of h. (c) Find the values of x for which h(x)=3h ( x ) = 3 (d) Find the values of x for which h(x)3h ( x ) \leq 3  The graph of a function h is given. (a) Find  h ( - 3 ) , h ( - 2 ) , h ( 2 ) , \text { and } h ( 4 )  (b) Find the domain and range of h. (c) Find the values of x for which  h ( x ) = 3  (d) Find the values of x for which  h ( x ) \leq 3

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Determine if the equation x2+y225=0x ^ { 2 } + y ^ { 2 } - 25 = 0 defines yy as a function of xx . Explain your answer.

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Determine whether or not the function g(x)=2x4g ( x ) = | 2 x - 4 | is one-to-one.

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Use a graphing device to draw the graph of the function f(x)=33x2f ( x ) = - 3 - 3 x ^ { 2 } . State approximately the intervals on which the function is increasing and on which the function is decreasing.

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A function is given. (a) Find all the local maximum and minimum values of the function and the value of x at which each occurs. (b) Find the intervals on which the function is increasing and on which the function is decreasing. State all answers correct to two decimal places. U(x)=4(x3x)U ( x ) = 4 \left( x ^ { 3 } - x \right)

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