Question

lf 1/√2 rational? explain​

Answer 1

So

(1√2) ×√2/√2

=√2/√2

if it is rational

√2/2=a/2b

Assuming a and b are lowest term

square both side

2/4=a^2\4b^2

so if a^2 is a multiple of 2, 2,so too must to be so let a=2n