For the natural numbers m, n, if (1-y)^m(1+y)^n=1+a_1y+a_2y^2+ +a^ m+n y^ m+n and a_1=a_2=10, then the value...

Question

For the natural numbers m, n, if (1-y)^m(1+y)^n=1+a_1y+a_2y^2+ +a^ m+n y^ m+n and a_1=a_2=10, then the value of (m+n) is equal to :

Accepted Answer

(D)

JEE Main 2021 Mathematics question