Question

How do you evaluate `log_(1/15) (1/225)`?

Answer 1

I found: `log_(1/15)(1/225)=2`

Explanation:

Here you need a number `x` such that:
`(1/15)^x=1/225`
You can find immediately that this number will be `x=2` in fact:
`(1/15)^2=1/225`