Let [x] denote greatest integer less than or equal to x. If for n N, (1-x+x^3)^n= _ j=0 ^ 3n a_jx^j then _...

Question

Let [x] denote greatest integer less than or equal to x. If for n N, (1-x+x^3)^n= _ j=0 ^ 3n a_jx^j then _ j=0 ^ [ 3n 2 ] a_ 2j +4 _ j=0 ^ [ 3n-1 2 ] a_ 2j+1 is equal to -

Accepted Answer

(C)

JEE Main 2021 Mathematics question

Solution