please explain this proof i can't understand it

Asked by sonaisha | 6th Mar, 2009, 01:05: PM

Expert Answer:

As p is not a perfect cube. Hence p1/3 and  p1/3 , p2/3  are irrartional numbers. Then we have b p1/3 +c p2/3   as irrational and a as rational. As sum of a rational number and an irrational number cannot give us a zero as answer so all the coefficiants (a,b and c) must be zero in general.

Answered by  | 8th Mar, 2009, 09:41: PM

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