Prove the given proposition using Proof Contradiction.
\(P(n): %u2200n%u2208Z, n^2+5\)P(n): %u2200n%u2208, n^2+5 is odd implies that n is even.
Remark: An integer n is even (odd) iff there exists an integer such that n = 2k (n=2k+1)
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