OOO OOO OOO:
Can someone check my proof for the following:
Prove that the set of irrational numbers is uncountable...
For this I said take the set I as the set of irrationals. R = Q U I
i.e. that the real numbers is the union of the rationals and irrationals
But we know R is irrational and Q is rational, and so using the property that the union of countable sets is countable, I must be uncountable!
Is that right? Is there any other way to do it (which isnt horrendously complex mind you!)