Question

Proof by contradiction

Theorem: The reciprocal of any irrational number is irrational.

Answer 1

find a situation that contradicts the statement

Answer 2

...or was that counteraxemple

Answer 3

contradiction is to assume the opposite is true, and show it to be in error

Answer 4

i was never good at the irrational proofs meself, so i dont think i can offer much more advice than that :)

Answer 5

im way lost then u are

Answer 6

Yah I'm not very good with these either. :3

http://in.answers.yahoo.com/question/index?qid=20090530201845AAWCuaI
Check out the best answer, it answers the question pretty well.
It's kinda brief, but it might give you a good idea of how to put this into your own words.