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Prove the following formulas by mathematical induction: 1. For all n Elementof Z_+: 1^3 + 2^3 + 3^3 + .. + n^3 = [n(n +

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Prove the following formulas by mathematical induction: 1. For all n Elementof Z_+: 1^3 + 2^3 + 3^3 + .. + n^3 = [n(n + 1)/2]^2

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