Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Engineering Mathematics Mathematical Logic Propositional Logic
Which of the following pairs of propositions are not logically equivalent ?
1
((p → r) ∧ (q → r)) and ((p ∨ q) → r)
2
p ↔ q and (¬ p ↔ ¬ q)
3
(p → q) ∧ (q → p) and p ↔ q
4
((p ∧ q) → r ) and ((p → r) ∧ (q → r))