JEE PYQ: Vector 3D Question 10
Question 10 - 2021 (17 Mar Shift 2)
Let $P$ be an arbitrary point having sum of the squares of the distance from the planes $x + y + z = 0$, $lx - nz = 0$ and $x - 2y + z = 0$ equal to 9. If the locus of the point $P$ is $x^2 + y^2 + z^2 = 9$, then the value of $l - n$ is equal to ______.