Question

If x and y are two rational numbers then which of the following is always is true? *​

Answer 1

Answer:

Explanation:

Third one is certainly wrong.

Interestingly 1 and 3 contradict each other.

Let's see how:

Let z = x - y

Substitute it in 3rd option

We get- |x-y| = 》 |z| = 》|z| + |y| =

This is exact opposite of what has been stated in option 1.

So one of them has to be wrong. Take an example with values of x and y having opposite signs, you ll see that opinion 1 is right hence option 3 is wrong.

Answer 2

Answer:

X and Y both so this is the answer