Exam 3: Polynomial and Rational Functions

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Determine whether f(x)=x2x6f ( x ) = x ^ { 2 } - x ^ { 6 } is even, odd, or neither.

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Since f(x)=f(x)f ( x ) = f ( - x ) , ff is even.  Since  f ( x ) = f ( - x )  ,  f  is even.

Evaluate f(1)f ( - 1 ) , f(0)f ( 0 ) , f(1)f ( 1 ) , for the piecewise-defined function. f(x)={12x if x02x1 if x>0f ( x ) = \left\{ \begin{array} { l l } 1 - 2 x & \text { if } x \leq 0 \\2 x - 1 & \text { if } x > 0\end{array} \right.

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E

Determine whether the curve represents a graph of a function. Determine whether the curve represents a graph of a function.

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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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If f(x)=3x2f ( x ) = 3 x - 2 and g(x)=3+2x2g ( x ) = 3 + 2 x ^ { 2 } , find fgf g and (fg)(x)( f \circ g ) ( x )

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If f(x)=3x2f ( x ) = 3 x - 2 and g(x)=3+2x2g ( x ) = 3 + 2 x ^ { 2 } , find fgf g And (gf)(x)( g \circ f ) ( x )

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Determine whether the function in the figure is even, odd, or neither. Determine whether the function in the figure is even, odd, or neither.

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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 interval(s) on which the function is increasing and on which the function is decreasing.

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Use a graphing calculator to find, approximately the range of the function. f(x)=x4x3+3x2+2x10f ( x ) = x ^ { 4 } - x ^ { 3 } + 3 x ^ { 2 } + 2 x - 10

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A function f is given, and the indicated transformations are applied to its graph (in the given order). Find the equation for the final transformed graph. f(x)=xf ( x ) = \sqrt { x } ; shift 5 units to the left, stretch vertically by a factor of 2 , and reflect in the xx -axis.

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Find the inverse of the function. g(x)=x29,x0g ( x ) = x ^ { 2 } - 9 , x \geq 0

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Use a graphing calculator to find, approximately the range of the function. f(x)=2x4x3+x2+2x7f ( x ) = 2 x ^ { 4 } - x ^ { 3 } + x ^ { 2 } + 2 x - 7

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Find the range of the function. f(x)=x22x+3f ( x ) = - x ^ { 2 } - 2 x + 3

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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 each answer correct to two decimal places. G(x)=2x2+x+1G ( x ) = \frac { 2 } { x ^ { 2 } + x + 1 }

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If g(x)=32x6g ( x ) = 3 - \sqrt { 2 x - 6 } , find g(5)g ( 5 )

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For the function g(t)=13t2g ( t ) = \frac { 1 } { 3 t - 2 } determine the average rate of change between the values t=0t = 0 and t=a+1t = a + 1 .

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Given f(x)=2+x2f ( x ) = 2 + x ^ { 2 } and g(x)=x4g ( x ) = \sqrt { x - 4 } , find (fg)(4)( f \circ g ) ( 4 )

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Find fghf \circ g \circ h , where f(x)=1xf ( x ) = \sqrt { 1 - x } , g(x)=1x2g ( x ) = 1 - x ^ { 2 } , h(x)=1+xh ( x ) = 1 + \sqrt { x }

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Sketch the graph of the function. f(x)={x if x<1x2 if 1x11 if x>1f ( x ) = \left\{ \begin{array} { l l c } - x & \text { if } \quad x < - 1 \\x ^ { 2 } & \text { if } & - 1 \leq x \leq 1 \\1 & \text { if } & x > 1\end{array} \right.

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Find the inverse of the function. g(x)=x216,x0g ( x ) = x ^ { 2 } - 16 , x \geq 0

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