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