Solve .

Answer and explanation

Correct answer: C. 5

  1. Step 1: Write as .
  2. Step 2: Equal bases give equal exponents: .
Answer
5.
Why not the others: 81: the number is divided by the base.

Practise more Exponents and Logarithms.

Free questions with an explanation for every one, and full timed EJU Japan mock tests.

All Exponents and Logarithms questionsTake a mock test

More Exponents and Logarithms questions