If ^ -1 x- ^ -1 y3= , where -1 x 1, ,-3 y 3, ,x y3, then for all x, y 9x^2-6xy +y^2 is equal to

MHT CET 2023 Mathematics question

If , where , then for all x, y is equal to

Answer: (C)

Let , so and . Then . Hence \dfrac$

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

Question ID VK-094794