If 1, , ^2 are the cube roots of unity, then ^2(1+ )^3-(1+ ^2) is equal to

JEE Main Mathematics question

If are the cube roots of unity, then is equal to

Answer: (D)

so , and the first term is . , so

Create a free account to read the complete working, and practise questions like this in a timed test.

Question ID VK-013296