(i) 1/√2
we know that √2 = 1.414..., which is an irrational number .
We can conclude that, when 1 is divided by √2 we will get an irrational number. Therefore, we conclude that 1/√2 is an irrational number.
(ii) 2π
We know that π = 3.1415...., which is an irrational number.
We can conclude that 2π will also be an irrational number.
Therefore, we conclude that 2π is an irrational number.