Find the sum of the coefficients of all even degree terms in x in the expansion of (x+ x^2-1 )^6+ (x- x^2-1...

Question

Find the sum of the coefficients of all even degree terms in x in the expansion of (x+ x^2-1 )^6+ (x- x^2-1 )^6, x R-(-1,1).

Accepted Answer

2

JEE Main Mathematics question