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Using the principle of mathematical induction for all n ∈ N prove that 1 + 2 + 3 +…+ n < [(2n + 1)^2] /8

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Prove that 1 + 2 + 3 +…+ n < (2n + 1)2 x 1/8

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To Prove that 1 + 2 + 3 +…+ n < (2n + 1)2 x 1/8

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