Question

We know that any number raised to the first power is 1. Fill in the blanks: log3 3=_. log5 5=_. log 10=_. log99 99=_. log4/5 4/5=_.

Answer 1

All are 1.

Reason: log_b(b) = 1 because b^1 = b. So
- log_3 3 = 1
- log_5 5 = 1
- log 10 = 1 (common log, base 10)
- log_99 99 = 1
- log_{4/5} (4/5) = 1

(Requirement: base > 0 and base ≠ 1, which holds here.)