Mathematics, 07.04.2021 22:30 groundcontrol

Two consecutive coefficients in the expansion of (1+ x)^n are 91 and 364. Prove that if they are the coefficients of the terms in x^r and x^(r+1), respectively, then n = 5r+4

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Two consecutive coefficients in the expansion of (1+ x)^n are 91 and 364. Prove that if they are the...