选择题由n个命题变元组成不等值的命题公式的个数为()(外国英文资料).docVIP

选择题由n个命题变元组成不等值的命题公式的个数为()(国外英文资料) Her collection of Feel very useful So upload to baidu Share it with you! Choice question The number of propositional formulas that are made up of n propositions of variable value are (). A. 2n. P: Im going to town Q: what do I have time Proposition Im going to town Only when I have time Amy polumbo? Q B.Q? P C.P? Q d.? Qu? P In the following formulas Which groups are dual to each other? (a) A.P, P, B.P. P, C.A, A The P is a separate argument A is A propositional variable that contains the connective. Set P: lets row Q: what do we run The proposition we cannot go boating and running is a sign of (). A.? Pu? Q b.? Pu? Q C? (P? Q) D.P? Q Which of the following statements is the negation of the proposition two is even or negative 3 is negative? (a) A. 2 is even or negative 3 is not negative C. 2 is odd or negative 3 is not negative C. 2 is not even and -3 is not negative d. 2 is odd and -3 is not negative P: I can do it three times Q: li four can do this The proposition zhang SAN or li si can do it is the symbol (). A.P, uQ, B.P. Q C.P? Q D.? (Pu? Q) Which of the following statements is true? (a) A. Im lying B. it is forbidden to smoke C. if 1 + 2 = 3 Then the snow is black D. if 1 + 2 = 5 Then the snow is black Which of the following join words is not commutative? (a) A.u B.? C.u.? The propositional formula (Pu (P? Q))? Q is () A. contradiction b. implicit c. restatement d. equivalent Which of the following statements is the tautology? (a) A. (P? Q)? P (? PuQ) u? (? Pu? Q)? (PuQ) Which of the following statements is equivalent? (a) A.? Pu? Q, PuQ B.A? (B? A)? A? B (A????) C.Q? (PuQ)? Qu (PuQ) D.? Au (AuB), B 12. P? The inverse of Q is () A.Q?? P b. P? Q C.? Q? P D.? Q?? P 13.? P? The inverse of Q is () A.Q?? P b. P? Q? P D.P? Q The following statements join the collection of words Which is the least connected phrase? (a) A. {? ,? {...} U, u. } The following join word collection Which is not the least connected phrase? (a) A. {? U} B.