Which of the following statements is true ?
1
A number is irrational if it can be expressed in the form \(\rm \frac{p}{q}\) where p and q are integers, q ≠ 0
2
Sum of any two irrational numbers is sometimes a rational number and sometimes an irrational number
3
Product of any two irrational numbers is always an irrational number
4
The square of an irrational number is always a rational number