Mathematical Logic - Mathematical Logic

16: ˥(P → Q) is equivalent to

A.	P ^ ˥Q
B.	P ^ Q
C.	˥P v Q
D.	None of these
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	Option: A Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

17: In propositional logic , which of the following is equivalent to p → q?

A.	~p → q
B.	~p v q
C.	~p v~ q
D.	p →q
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	Option: B Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

18: Which of the following is FALSE?
Read ^ as And, v as OR, ~as NOT, →as one way implication and ↔ as two way implication?

A.	((x → y)^ x) →y
B.	((~x →y)^ ( ~x ^ ~y))→y
C.	(x → ( x v y))
D.	((x v y) ↔( ~x v ~y))
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	Option: D Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

19: Which of the following well-formed formula(s) are valid?

A.	((P → Q)^(Q → R))→ (P → R)
B.	(P → Q) →(˥P → ˥Q)
C.	(P v (˥P v ˥Q)) →P
D.	((P → R) v (Q → R)) → (P v Q}→R)
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	Option: A Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

20: The correct prefix formula is

A.	→˥,P v Q ↔˥R ˥S
B.	→P˥Qv ↔ ˥R
C.	→→PQ→→QR→PR
D.	→˥PV ↔ QSP
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	Option: C Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

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