if , then or .

Im not sure how to prove this.

I tried this method here from the user xalk, but it didnt seem to work for this question even though this one is similar.

http://www.mathhelpforum.com/math-he...gic-proof.html

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- Sep 22nd 2009, 06:47 PMp00ndawgLogic proof question
if , then or .

Im not sure how to prove this.

I tried this method here from the user xalk, but it didnt seem to work for this question even though this one is similar.

http://www.mathhelpforum.com/math-he...gic-proof.html - Sep 22nd 2009, 07:17 PMpickslides
Here's a start

Now solve for x. - Sep 22nd 2009, 07:20 PMartvandalay11