Question

please batao batao please​

Answer 1

Well, why to worry in these simple numericals? First of all, you have to know all the formulas. Without knowing formulas, you are not be able to solve these kind of numericals. Let us see the step by step solution to this question.

x³ + y³ + z³ = 3 xyz

Or, x³ + y³ + z³ - 3xyz = 0

Or, (x+y+z) (x²+y²+z²-xy-yz-xz) = 0

So,

Either : x+y+z = 0

Or : x²+y²+z²-xy-yz-xz = 0

So, accordingly, option (3) is correct, since x+y+z = 0, which can also mean

x = 0, y = 0 and z = 0