CR Unit 5 Quiz Review

If  $f\left(x\right)=2x$   and  $g\left(x\right)=2x^2-1$   find  $f\left(g\left(3\right)\right)$  

• 34

• 71

• 35

• 142

If  $f\left(x\right)=2x$   and  $g\left(x\right)=2x^2-1$   find  $f\left(g\left(x\right)\right)$  

•  $4x^2-1$  

•  $4x^2-2$  

•  $8x^2-1$  

•  $16x^2-1$  

When f(x) = x² + 9 and g(x) = x - 9,

find f(x) - g(x).

• x² + x + 9

• x² - x + 9

• x² - x

• x² - x + 18

Use the property  $\log_b\left(\frac{x}{y}\right)\ =\ \log_b\left(x\right)\ -\ \log_b\left(y\right)$  
to expand  $\log_2\left(\frac{x}{4}\right)\$  

•  $\log_2\left(x\right)\ \times\ \log_2\left(4\right)$ 

•  $\log_2\left(x\right)\ +\ \log_2\left(4\right)$ 

•  $\log_2\left(x\right)\ -\ \log_2\left(4\right)$ 

•  $\log_2\left(5\right)\ -\ \log_2\left(x\right)\$ 

Rewrite log_x95 = 2.3

• x^2.3 = 95

• 95^2.3 = x

• 2.3⁹⁵ = x

• x⁹⁵ = 2.3

log(4x)

• log4-logx

• log4+logx

• 4logx

• xlog4

log(xy²)

• logx+2logy

• logx+logy²

• logx-2logy

• logx+logy+log2

Solve:

log (x - 1) - log (x - 2) = log 5

• 7

• 4/9

• 9/4

• 1/7

Solve:

ln(x+8) - ln (8) = 3

• 152.68

• 188.77

• 4.24

• 8.01

Solve for x.
 $\log_8\left(x\right)+\log_8\left(x+2\right)=1$  

• 2, 13

• 2, -4

• 4

• 2