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If Cr stands for nCr , the sum of the given series 2(n2)!(n2)!n![C20−2C21+3C22−⋯+(−1)n(n+1)C2n]

Answer»

If Cr stands for nCr , the sum of the given series 2(n2)!(n2)!n![C202C21+3C22+(1)n(n+1)C2n]



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