If the coefficients of three consecutive terms in the expansion of are 165, 330 and…

MATHEMATICS · Single correct · A Level · Mathematics · Sequences and series · Sequences and series

Problem

If the coefficients of three consecutive terms in the expansion of

(1+x)^n

are 165, 330 and 462 respectively, the value of

n

is (1) 7 (2) 9 (3) 11 (4) 13