Math 9 Reviewer

Find f(5), if  f(x) = x + 2 / (x – 12)

• 1

• -1

• 1/2

• 5/12

Perform the indicated operation.

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Perform the indicated operation.

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f(g(x))

• 3x - 16

• 3x - 2

• 3x - 26

• 4x - 2

Perform the indicated operation.

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If f(x) = 2x² + 5x - 3, evaluate f(4).

• f(4) = 4

• f(4) = 49

• f(4) = 25

• f(4) = 55

f(x) = 3x + 10
g(x) = x - 2
Find f(g(5))

• 19
• 23
• -10
• None of these.

f(x)= x+3

g(x)= x-2

Find (g(x) / f(x))

Be careful!!

• (x + 3)/(x - 2)

• (x - 2)/(x + 3)

• -2/3

• 3/2

 $g\left(x\right)=-7x^5+7$  Find the inverse of the function.

•  $g^{-1}\left(x\right)=^5\sqrt{\frac{x-7}{7}}$  

•  $g^{-1}\left(x\right)=-^5\sqrt{\frac{x-7}{7}}$  

•  $g^{-1}\left(x\right)=^5\sqrt{-\frac{x-7}{7}}$  

•  $g^{-1}\left(x\right)=-^5\sqrt{\frac{x-7}{7}}$  

Which of the following best describes the graph?

• They are both functions, but not inverse functions.

• They are inverse functions.

• They are reflected over y=x, but they are not both functions.

• They are not reflected over y=x, and they are not both functions.