Solve . What is ?

Answer and explanation

Correct answer: D.

  1. Step 1: Write both sides as powers of : and .
  2. Step 2: Equate the exponents: , so .
  3. Step 3: Hence .
Answer
.
Why not the others: At the exponents are and ; at they are and ; at they are and ; at they are and . In none of these are the two exponents equal.

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