If 3^(2x - 1) = 27, find the value of x.
Answer and explanation
Correct answer: B. 2
- Step 1: Express both sides with base 3: 27 = 3^3, so 3^(2x - 1) = 3^3. Step 2. Equate exponents: 2x - 1 = 3 -> 2x = 4 -> x = 2. Answer: 2. Why not the others: 1 gives 3^1 = 3; 3 gives 3^5 = 243; 4 gives 3^7 = 2187.
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