How can we identify whether root 2 is irrational

1.	How can we identify whether root 2 is irrational
Answer» Let Us assume that root 2 is a rational no. Than, exist of Co-prime a and b. B is not equal to zeroRoot 2 = a/b Since a/b is rational no. But root 2 is irrational no so root 2 is irrational no. See NCERT pg no-12 Lat wrong assumption

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