1.Let Δ,∇∈{∧,∨}\Delta, \nabla \in \{\land, \lor\}Δ,∇∈{∧,∨} be such that p∇q→((pΔq)∇r)p \nabla q \rightarrow ((p \Delta q) \nabla r)p∇q→((pΔq)∇r) is a tautology. Then (p∇q)Δr(p \nabla q) \Delta r(p∇q)Δr is logically equivalent toa.(pΔr)∨q(p \Delta r) \lor q(pΔr)∨qb.(pΔr)∧q(p \Delta r) \land q(pΔr)∧qc.(p∧r)Δq(p \land r) \Delta q(p∧r)Δqd.(p∇r)∧q(p \nabla r) \land q(p∇r)∧qLogin to continueOnly logged in users canattempt or see the solution.
