How do you evaluate log_5 25?

1 Answer
Aug 12, 2016

log_5 25 = 2

Explanation:

Written in this form, the question being asked is..

"To what power must 5 be raised to give 25?"

Or, "How can 5 become 25 by raising to a power?"

We know that 5^2 = 25, so we can say

log_5 25 = 2

We can also change log form into index form:

log_5 25 = x becomes 5^x = 25

So x = 2