The sum of the co-efficients of all odd degree terms in the expansion of (x + x^3 - 1 )^5 + (x - x^3 - 1 )^5,...

Question

The sum of the co-efficients of all odd degree terms in the expansion of (x + x^3 - 1 )^5 + (x - x^3 - 1 )^5, (x > 1) is

Accepted Answer

(D)

JEE Main 2018 Mathematics question