If the coefficients of x7 and x8 in 2+x3n are equal, then n is(a) 56(b – InterviewSolution

1.	If the coefficients of x7 and x8 in 2+x3n are equal, then n is(a) 56(b) 55(c) 45(d) 15
Answer» If the coefficients of x⁷ and x⁸ in ${(2 + \frac{x}{3})}^{n}$ are equal, then n is (a) 56 (b) 55 (c) 45 (d) 15

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