Difficulty: Easy
Correct Answer: 12
Explanation:
Introduction / Context:
Exponent rules are central in this problem. Recognizing powers of 2 and rewriting square roots in exponential form lead to a quick solution.
Given Data / Assumptions:
Concept / Approach:
Convert √2 to exponential form, then equate exponents for equal bases. If 2^(n/2) = 2^6, then n/2 = 6 and n follows immediately.
Step-by-Step Solution:
√2 = 2^(1/2). (√2)^n = (2^(1/2))^n = 2^(n/2). Given 2^(n/2) = 64 = 2^6. Therefore n/2 = 6 ⇒ n = 12.
Verification / Alternative check:
Substitute back: (√2)^12 = (2^(1/2))^12 = 2^6 = 64. Correct.
Why Other Options Are Wrong:
2, 4, 6 do not satisfy 2^(n/2) = 2^6.
Common Pitfalls:
Misreading √2^n as √(2^n) rather than (√2)^n changes the equation. The wording here clarifies it should be interpreted as (√2)^n.
Final Answer:
12
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