Exam 2: Functions

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Graph the function. - g(x)={1x+1,x<1x,x1g ( x ) = \left\{ \begin{array} { l l } \frac { 1 } { x + 1 } , & x < - 1 \\x , & x \geq - 1\end{array} \right.  Graph the function. - g ( x ) = \left\{ \begin{array} { l l }  \frac { 1 } { x + 1 } , & x < - 1 \\ x , & x \geq - 1 \end{array} \right.

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Simplify the expression. - elnx10e ^ { - \ln x ^ { 10 } }

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Find the domain and range of the function. - g(z)=25z2g ( z ) = \sqrt { 25 - z ^ { 2 } }

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State the domain and range of the function. - f(x)=ex+2f ( x ) = e ^ { x } + 2

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Determine from its graph if the function is one-to-one. - f(x)={8x+6,x<02x25,x0f ( x ) = \left\{ \begin{array} { l l } 8 x + 6 , & x < 0 \\2 x ^ { 2 } - 5 , & x \geq 0\end{array} \right.

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Solve the problem. -Let g(x)=xg ( x ) = \sqrt { x } . Find a function y=f(x)y = f ( x ) so that (fg)(x)=x( f \circ g ) ( x ) = | x | .

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Express the given quantity in terms of sin x or cos x. - sin(7π2+x)\sin \left( \frac { 7 \pi } { 2 } + x \right)

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Express the given quantity in terms of sin x or cos x. - sin(5π+x)\sin ( 5 \pi + x )

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Solve the problem. -Use the formu P=Iekt\mathrm { P } = \mathrm { Ie } ^ { \mathrm { kt } } where P is the resulting population, I is the initial population, and t is measured in hours. A bacterial culture has an initial population of 10,000. If its population declines to 3000 in 6 hours, what Will it be at the end of 8 hours?

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Find the domain and range of the inverse of the given function. - f(x)=(8x1)3f ( x ) = ( 8 x - 1 ) ^ { 3 }

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Graph the function. Determine the symmetry, if any, of the function. - y=1x3y = \frac { 1 } { x ^ { 3 } }  Graph the function. Determine the symmetry, if any, of the function. - y = \frac { 1 } { x ^ { 3 } }

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Graph the function. - f(x)={5x,x<11,x1f ( x ) = \left\{ \begin{array} { l l } - 5 - x , & x < 1 \\1 , & x \geq 1\end{array} \right.  Graph the function. - f ( x ) = \left\{ \begin{array} { l l }  - 5 - x , & x < 1 \\ 1 , & x \geq 1 \end{array} \right.

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State the domain and range of the function. - f(x)=2x+5f ( x ) = 2 ^ { x } + 5

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Express as a single logarithm and, if possible, simplify. - ln(32x+16)2ln4\ln ( 32 x + 16 ) - 2 \ln 4

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Graph the function. -  Graph five periods of the function f(x)=tan4x\text { Graph five periods of the function } \mathrm { f } ( \mathrm { x } ) = \tan 4 \mathrm { x } \text {. }  Graph the function. - \text { Graph five periods of the function } \mathrm { f } ( \mathrm { x } ) = \tan 4 \mathrm { x } \text {. }

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Find the inverse of the function. - f(x)=x37f ( x ) = x ^ { 3 } - 7

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Use a graph to find an approximate solution to the equation. Round to the nearest thousandth. - 5(x1)=95 ( x - 1 ) = 9

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Find the formula for the function. -Express the area of a circle as a function of its radius r.

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Determine an appropriate viewing window for the given function and use it to display its graph. - f(x)=sin3xxf ( x ) = \frac { \sin 3 x } { x }  Determine an appropriate viewing window for the given function and use it to display its graph. - f ( x ) = \frac { \sin 3 x } { x }

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Use a graph to find an approximate solution to the equation. Round to the nearest thousandth. - 4e2x+6=204 e ^ { 2 x + 6 } = 20

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