The sum of the co-efficients of all even degree terms in x in the expansion of (x+ x^3-1 )^6+ (x- x^3-1 )^6,...

Question

The sum of the co-efficients of all even degree terms in x in the expansion of (x+ x^3-1 )^6+ (x- x^3-1 )^6, (x>1) is equal to

Accepted Answer

(A)

JEE Main Mathematics question