Let & € N. Prove by using the contra-positive that if ³ is odd then x is odd. Proof: Choose the correct starting premise for a proof using the contra-positive: [Select] [Select] If x is even, then x^3 is even If x is even, then x^3 is odd If x^3 is even, then x is even If x^3 is odd, then x odd 2x is even, and hence (2x)^3 is even

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