Q. If the sum of the coefficient in the expansion of ${(x + y)}^{n}$ is 1024, then the value of the greatest coefficient in the expansion is

A) 356
B) 252
C) 210
D) 120
Explanation

(b)
Given sum of the coefficient $= 1024$
$ie,\ \ 2^{n} = 1024 = 2^{10}$
$\Longrightarrow n = 10$
Since, $n$ is even, so greatest coefficient
$= \ ^{n}C_{n/2} = \ ^{10}C_{5} = 252$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.