What's a counterexample in this context? Can anyone help with this question? "Find a counterexample for: 3^n +1 is divisible by 4."
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Originally Posted by 14041471 What's a counterexample in this context? Can anyone help with this question? "Find a counterexample for: 3^n +1 is divisible by 4." Well, if n = 2, then 3^n + 1 = 10, which is not divisible by 4. So you can say 2 is a counterexample to 3^n + 1 = 4. Whereas if n =1; 3^1 + 1 = 4, is an example.
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