If the co-efficient of x^9 in ( x^3- 1 x )^ 11 and the coefficient of x^ -9 in ( x- 1 x^3 )^ 11 are equal,...

Question

If the co-efficient of x^9 in ( x^3- 1 x )^ 11 and the coefficient of x^ -9 in ( x- 1 x^3 )^ 11 are equal, then ( )^2 is equal to _________.

Accepted Answer

1

JEE Main 2023 Mathematics question