Question: 4. Examine the following theorem: If (A or B) -> X. Use proof by contraposition to show whether or not BOTH A and B need

4. Examine the following theorem: If (A or B) -> X.

4. Examine the following theorem: If (A or B) -> X. Use proof by contraposition to show whether or not BOTH A and B need to be proven either T/F 5. Use the contraposition proof technique to prove the following: f x *y is odd, then xty is odd. 6. Show the following are tautologies: (proof by cases) RV(-R)

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