pls...answer

Asked by  | 24th Apr, 2009, 10:36: PM

Expert Answer:

Let 3 be rational

then 3= a/b

3=a2/b2

3b2=a2

then 3 is a factor or a2 and a  

let a=3c

3b2= 9c2

 b2=3c2

therefore 3 is a factor of b2and b

but this cannot take place since a and b dont have any common factor other than one

so our original assumption is wrong that 3 is rational

therefore  3 is irrational number.

Answered by  | 27th Apr, 2009, 04:35: PM

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