Answer :
Let us assume, to the contrary, that is rational.
So that we can find integers a and b (b ≠ 0), such that where a and b coprime.
Rearranging this equation, we get
⇒
⇒
Since a and b are integers, we get that is rational and so is irrational.
So we contradicts the fact that is irrational.
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RS Aggarwal - Mathematics