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If \(n\) is a positive integer, is \(n^3 - n\) divisible by \(4 ?\)
(1) \(n = 2k + 1,\) where \(k\) is an integer.
(2) \(n^2 + n\) is divisible by \(6.\)
Answer: A
Source: Official Guide
(1) \(n = 2k + 1,\) where \(k\) is an integer.
(2) \(n^2 + n\) is divisible by \(6.\)
Answer: A
Source: Official Guide
