Prove the following by proof by cases: min(a, min(b, c)) = min(min(a, b), c) for real...

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Prove the following by proof by cases: min(a, min(b, c)) = min(min(a, b), c) for real numbers a, b, c Prove the following by proof by cases: min(a, min(b, c)) = min(min(a, b), c) for real numbers a, b, c