1 votes 1 votes Isn’t the 3) statement is wrong it should be [(p->r)^(q->r)]->[(p∨q)->r] \ Mathematical Logic zeal discrete-mathematics mathematical-logic propositional-logic zeal2019 + – Prince Sindhiya asked Jan 7, 2019 • retagged Mar 6, 2019 by ajaysoni1924 Prince Sindhiya 711 views answer comment Share Follow See all 3 Comments See all 3 3 Comments reply Prince Sindhiya commented Jan 7, 2019 reply Follow Share its answer given all 3 i am getting 1 and 2 0 votes 0 votes Lakshman Bhaiya commented Jan 7, 2019 i edited by Lakshman Bhaiya Jan 7, 2019 reply Follow Share $3^{rd}$ is Tautology. 0 votes 0 votes neeraj33negi commented Jan 7, 2019 reply Follow Share yeah, all are tautology, for case 3, just fill truth table for the entries where RHS will be will be false. 1 votes 1 votes Please log in or register to add a comment.
0 votes 0 votes All the three are tautologies. Option 1 can be resolved. Option B and C can be quickly verified by substituting the values of P,Q,R,S Hence option d is correct. rish1602 answered Jul 19, 2021 rish1602 comment Share Follow See all 0 reply Please log in or register to add a comment.
