Question

Prove that 1 upon root 2 is irrational​

Answer 1

We know that rational number is in the form of p,/q where q is not 0,.

1/√2 = p/q

√2 / 1 = q/p (reciprocal) (p is not 0)

We know that √2 is irrational hence, 1/√2 is also irrational.