_________ 1. Proof by Exhaustion allows you to prove a conjecture is true for some integers. _________ 2. A proof by contradiction of P Q, begins by...

_________ 1. Proof by Exhaustion allows you to prove a conjecture is true for some integers.

_________ 2. A proof by contradiction of P → Q, begins by assuming that

P V Q are true.

_________ 3. If Q′ → P is true, then P' → Q is true.

_________ 4. To prove A if and only if B, you need to prove A → B and B → A.

__________5. To prove that something is not true, a proof by contradiction is helpful.

__________6. One counterexample is enough to prove a conjecture.

__________7. A proof by contradiction uses the negation of the antecedent to deduce the consequent.

__________8. The converse cannot be used to prove that a conjecture is true.