Prove by contradiction that 2^(1/3) is irrational.

I made a=2^(1/3).

a^2= 2^(2/3)

then 2^(2/3)=M^2because we assume a is rational

N^2

then what do I do

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- Nov 20th 2009, 08:49 AMhebbyProve by contradiction
Prove by contradiction that 2^(1/3) is irrational.

I made a=2^(1/3).

a^2= 2^(2/3)

then 2^(2/3)=__M^2__because we assume a is rational

N^2

then what do I do - Nov 20th 2009, 08:57 AMaman_cc
- Nov 20th 2009, 09:05 AMhebby
Thanks...I can see the proof now...Merci!..it was quite easy