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16 Sep 2014, 00:20
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16 Sep 2014, 00:20
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Official Solution:
What is the value of integer \(k\)?
(1) \(2^k=1\).
If a base is neither -1 nor 1, then for exponentiation to yield 1, the exponent must be 0. Consequently, it follows that \(k = 0\). Sufficient.
(2) \(1^k=1\).
This equation holds true for any value of \(k\). Not sufficient.
Answer: A
What is the value of integer \(k\)?
(1) \(2^k=1\).
If a base is neither -1 nor 1, then for exponentiation to yield 1, the exponent must be 0. Consequently, it follows that \(k = 0\). Sufficient.
(2) \(1^k=1\).
This equation holds true for any value of \(k\). Not sufficient.
Answer: A
General Discussion
22 May 2016, 04:59
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Bunuel
Hi Bunuel,
Can you please explain point number 2. (This equation holds true for any value of \(k\). Not sufficient.)
A. When 2 power K = 2 power 0 = 1...I thought this is fine.. sufficient.
B. When 1 power K = 1 power 0 = 1....thought even this is sufficient. Then I chose D.
