CFA #4 Review

Exponents

100

5³= 

125

200

4^-2= 

1/16

300

What is 5^-2

1/25

400

6⁰+6¹=

7

500

6^-1+6²= 

36 1/6 

Logs

100

log₂(16)=?

4

200

log₇(49)=?

2

300

log₄(1/16)=?

-2

400

log₃(?)=3

27

500

log_?(9)=2

3

LOGS-EXP

100

rewrite the log as an exp

log₂(4)=2

2²=4

200

Rewrite the exponent as a log

4³=64

log₄(64)=3

300

Rewrite the log as an exponent 

log_x(9)=y

x^y=9

400

Rewrite the exp as a log

y=3^x

log₃(y)=x

500

Fill in the blanks to make a correct solution (many possible answers) 

log_?(1/16)=?

many possible answers 

log₄(1/16)=-2

log₁₆(1/16)=-1

Inverse

100

Find the inverse of the equation 

y=x-2

y=x+2

200

Find the inverse of 

f(x)=5x-7

f^-1(x)=(x+7)/5

300

Find the inverse of 

f(x)=x³-4

f^-1(x)=cuberoot(x+4)

400

Find the inverse of 

y=(x-1)³-4

y=cuberoot(x+4) +1

500

Find the inverse of 

y=log₆(x+1)

6^x-1=y

RANDOM

100

What singer's real name is Robyn Fenty

Rihanna

200

What three states share a border with California 

Arizona, Nevada, Oregon

300

How many legs does a lobster have? 

10 

400

When was the first iPod released? 

2001

500

What is the CFA on? 

Logarithms, exponents, Inverse