Basics of Math: Evaluating Logarithms - Practice #2
Given log3 12≈ 0.792 and log3 2 0.631 to approximate the value of each expression.
1. log3 6
2. log3 24
3. log3 32
Change-of-Base Formula
If a, b, and care positive numbers with b + 1 and c# 1, then:
log a =
In particular, log, a =
log a
log c
log, a
log, c
4. log3 /
and log a =
In a
In c
Use Change-of-Base formula to evaluate each problem. Round to the nearest thousandths.
6. log5 13
5. log47m
