If ^ -1 x+ ^ -1 y+ ^ -1 z= and x^2+y^2+z^2+kxyz=1, then k is

MHT CET 2024 Mathematics question

If and , then k is

Answer: (4)

Let so and . Then , i.e. , so . Squaring:

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

Question ID VK-095698