find-the-coefficient-of-x-50-in-the-1-x-1000-2x-1-x-999-3x-2-1-x-998-

Question Number 149155 by gsk2684 last updated on 03/Aug/21

f i n d t h e c o e f f i c i e n t o f x^{50} i n t h e

{(1 + x)}^{1000} + 2 x {(1 + x)}^{999} + 3 x^{2} {(1 + x)}^{998} + \dots \infty