0 votes 0 votes Use rules of inference to show that if $\forall x (P(x) \rightarrow (Q(x) \wedge S(x)))$ and $\forall x ( P(x) \wedge R(x))$ are true, then $\forall x (R(x) \wedge S(x))$ is true. Mathematical Logic kenneth-rosen discrete-mathematics mathematical-logic propositional-logic + – Pooja Khatri asked Mar 19, 2019 Pooja Khatri 218 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.