Homework Help: Logic

Posted by lost on Thursday, July 21, 2005 at 11:56am.

Having problems with solving this question. The directions are: Use the 18 rules of inference, supply a proof.

1.(RvX)>(A>B)
2.~Q>~C
3.~C>Z
4.R.Y
5.QvA
The conclusion I'm supposed to arrive at is /ZvB

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