# How do you evaluate #log_81 3#?

##### 2 Answers

Nov 2, 2016

#### Explanation:

Rewrite as an exponential. Remember, the answer to a log is the exponent. In this case

Find a common base for both sides, which is

Use the exponent rule

Nov 2, 2016

#### Explanation:

Since

Using the law of exponents, we know that if