Exam 16: Rational Functions

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Find domain of the following function.​ g(x)=1x+7g ( x ) = \frac { 1 } { x + 7 }

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A

Determine the zeros (if any)of the rational function f(x)=x24x4f ( x ) = \frac { x ^ { 2 } - 4 } { x - 4 } .

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Determine the zeros (if any)of the rational function f(x)=x281x+2f ( x ) = \frac { x ^ { 2 } - 81 } { x + 2 } .

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D

Find the zeros (if any)of the rational function.​ f(x)=1+6x27f ( x ) = 1 + \frac { 6 } { x ^ { 2 } - 7 }

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Determine the equations of any horizontal and vertical asymptotes of f(x)=x5x225f ( x ) = \frac { x - 5 } { x ^ { 2 } - 25 } .

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The game commission introduces 100 deer into newly acquired state game lands.The population N of the herd is modeled by​ N=22(5+3t)1+0.04t,t0N = \frac { 22 ( 5 + 3 t ) } { 1 + 0.04 t } , t \geq 0 ​ where t is the time in years. Select the correct graph of this model. ​

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Find the domain of the function and identify any vertical and horizontal asymptotes.​ f(x)=x3x249f ( x ) = \frac { x ^ { 3 } } { x ^ { 2 } - 49 }

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Find the zeros (if any)of the rational function.​ g(x)=x38x2+1g ( x ) = \frac { x ^ { 3 } - 8 } { x ^ { 2 } + 1 }

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Determine the domain of the function f(x)=5(x2)4f ( x ) = \frac { 5 } { ( x - 2 ) ^ { 4 } } .

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Determine the zeros (if any)of the rational function g(x)=5+6x2+5g ( x ) = 5 + \frac { 6 } { x ^ { 2 } + 5 } .

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Determine the equations of the vertical and horizontal asymptotes of the graph of the function f(x)=5x2x24f ( x ) = \frac { 5 x ^ { 2 } } { x ^ { 2 } - 4 } .

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Find the domain of f(x)=x225x2+3x40f ( x ) = \frac { x ^ { 2 } - 25 } { x ^ { 2 } + 3 x - 40 } .

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Determine the equations of any horizontal and vertical asymptotes of f(x)=x29x2+x12f ( x ) = \frac { x ^ { 2 } - 9 } { x ^ { 2 } + x - 12 } .

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Identify all intercepts of f(x)=x2x2+25f ( x ) = \frac { x ^ { 2 } } { x ^ { 2 } + 25 } .

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Given f(x)=x2+49x+7,g(x)=x7f ( x ) = \frac { x ^ { 2 } + 49 } { x + 7 } , g ( x ) = x - 7 .Determine the domains of f(x)and g(x). ​

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Given f(x)=x236x+6,g(x)=x6f ( x ) = \frac { x ^ { 2 } - 36 } { x + 6 } , g ( x ) = x - 6 .Complete the table and explain how the two functions differ. x -8 -7.5 -7 -6.5 -6 -5.5 -5 f(x) g(x)

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Determine the equations of the vertical and horizontal asymptotes of the graph of the function f(x)=1x5f ( x ) = \frac { 1 } { x - 5 } .

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Find the domain of f(x)=x+2x24f ( x ) = \frac { x + 2 } { x ^ { 2 } - 4 } .

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The cost C (in millions of dollars)of removing p% of the industrial and municipal pollutants discharged into a river is given by​ C=235p100p,0p<100C = \frac { 235 p } { 100 - p } , 0 \leq p < 100 . ​ According to this model,would it be possible to remove 100% of the pollutants? Explain. ​

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Find the zeros (if any)of the rational function.​ f(x)=2+12x2+2f ( x ) = 2 + \frac { 12 } { x ^ { 2 } + 2 }

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