Let , , and be the coefficients of x^7, x^5, x^3 and x respectively in the expansion of (x + x^3 - 1 )^5 + (x...

Question

Let , , and be the coefficients of x^7, x^5, x^3 and x respectively in the expansion of (x + x^3 - 1 )^5 + (x - x^3 - 1 )^5, x > 1. If u and v satisfy the equations array l u + v = 18 u + v = 20 array then u + v equals :

Accepted Answer

1

JEE Main 2025 Mathematics question

Solution