How do you evaluate log_3 81 ?

1 Answer
Nov 11, 2015

The answer is 4.

Explanation:

log_(3)81 is the same thing as writing 3^x = 81, where you have to solve for x. 3 is the base number.

3 * 3 * 3 * 3 is 81, proving 3^4 = 81. So, 4 is the answer.