Question: 1. Find a counterexample to show that it is false. If n is an integer and n is divisible by 4, then n is divisible

1. Find a counterexample to show that it is false. If n is an integer and n is divisible by 4, then n is divisible by 4 2. Proof by cases: For a real number x, x >x. 3. Proofs by contradiction The average of three real numbers is greater than or equal to at least one of the numbers

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