Mathematics, 25.09.2021 08:10, queenkimm26

In the binomial expansion of (1+x/k)^n where k is a non zero constant, n is an integer and n> 1, the coefficient of x^2 is three times the coefficient of x^3 . Show that k =n-2.

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In the binomial expansion of (1+x/k)^n where k is a non zero constant, n is an integer and n> 1,...