Question

prove that 2 root 7 is irrational number

Answer 1

Hey freind here is your answer.

To prove : 2√7 is irrational

Proof : As we know √7 = 2.6457513111.....
so by this value of √7 we proved √7 as an irrational number.
As we know multipiclation of irrational and a rational number is also irrational so 2 * √7 will also be irrational.
So we proved 2√7 as an irrational number.

Hope it helps. Please chose answer as the brillianist answer.