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| 1. |
3√5 is irrational |
| Answer» Let,three root five is rational number.We can find co-prime integer p and q (not equal to zero).Three root five = p/qRoot five =p/seven qSince, p and q are integer , p/seven q is rational,and root five is rational.But this contradicts the fact that root five is an irrational number.So,we conclude that seven root five is an irrational number. | |