Question

let X be rational and y be in rational is xy necessary in rational justify your answer with example​

Answer 1

Answer:

yes

Step-by-step explanation:

first of all note down that every integer can be written as a rational number so if multiply of x&y will come an integer which is also a rational number.

Answer 2

The product of 2 rational numbers should always be rational. ie. x*y=xy which is rational.

For example,

Let x be 2 ( which is rational)

Let y be 10 (which is also rational)

Then their product will be :

2*10

20.

Hence proved.

This happens in all the cases.