If , what is the value of ?

Answer and explanation

Correct answer: A.

  1. Step 1: Factor out : .
  2. Step 2: Divide by : .
  3. Step 3: Since , .
Answer
.
Why not the others: and come from misreading as a single power of near or ; confuses the value with a division by .

Practise more Exponents and radicals.

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