1) (C -> A) and (!C -> B)(adsbygoogle = window.adsbygoogle || []).push({});

2) (A and C) or (!C and B)

I use the logic calculator and found these two formulas are logical equivalent, but I spend 2 hours there and still can't prove it because I can't eliminate one of the three items.

Can anyone help me?

Thanks in advance!

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# How to work that out?

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