Solve .
Answer and explanation
Correct answer: D.
- Step 1: Write , so .
- Step 2: Equate indices: , so .
Answer
.
Why not the others: : the 2 in the index was ignored. : the index equation was inverted. : 125 was divided by 2.
Practise more Logarithms, Polynomials and Trigonometry.
Free questions with an explanation for every one, and full timed Scottish Highers mock tests.