if the coefficient of (r-1)th, rth and (r+1)th terms in the expansion of (1+x)^n are in the ratio 1:7:42, find - Maths - Binomial Theorem

Question

if the coefficient of (r-1)th, rth and (r+1)th terms in the
expansion of (1+x)^n are in the ratio 1:7:42, find n and r

Varun.Rawat · Accepted Answer

Kindly refer the following link :

https://www meritnation
com/ask-answer/question/in-the-expansion-of-1-x-nare-in-the-ratio-1-7-42-find/binomial-theorem/466923

if the coefficient of (r-1)th, rth and (r+1)th terms in the expansion of (1+x)^n are in the ratio 1:7:42, find n and r