Given the integers r > 1, n > 2, and coefficient of (3r)th and (r + 2) – InterviewSolution

1.	Given the integers r > 1, n > 2, and coefficient of (3r)th and (r + 2)nd terms in the binomial expansion of (1 + x)2n are equal, then(a) n = 2r(b) n = 3r(c) n = 2r + 1(d) none of these
Answer» Given the integers r > 1, n > 2, and coefficient of (3r)^th and (r + 2)^nd terms in the binomial expansion of (1 + x)²ⁿ are equal, then (a) n = 2r (b) n = 3r (c) n = 2r + 1 (d) none of these

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