test

LOGARITHMS

be prepared for fun

Multiple Choice

why is logarithm used?

• for fun

• to make exponential calculations easier

Rules

 $\log_xy\ =a$  can be written as
 $x^a=y$  

for eg:   $\log_24\ =x$  can be written as
 $2^{x\ }=4$  
 $2^x=2^2$  
so  $x=2$  

Multiple Choice

find x if

 $\log_416\ =x$  
hint- convert into exponential form

• 2

• 1

• 5

• 3

RULE 1