Question

How do you solve `\frac { 1} { 9} = 9^ { 4x }`?

Answer 1

`x=-1/4`

Explanation:

`1/9=9^(4x)`

But `1/9=9^-1`

So

`9^-1=9^(4x)rArr-1=4xrArrx=-1/4`