Prove that is an irrational number.

Given:

To prove: It is irrational number.

Explanation:

Suppose that is a rational number.

It means it will be of for where a and b are integers and b not equal to zero.

So,

But √5 Is an irrational number which contradicts the fact that is a rational number.

So, our assumption is wrong.

Hence,is an irrational number.