Traditional Culture Encyclopedia - Weather inquiry - Discrete mathematical problems. Symbolization of propositions.
Discrete mathematical problems. Symbolization of propositions.
1, (1)P: I'll eat after I finish my homework. Q: It won't rain. R: We'll go to the ball game.
p∧Q-& gt; rare
(2)P: The weather is fine, Q: Here comes Lao Wang. p->; √Q
2,P→(Q→R) →^P∨(^Q∨R)→^P∨^Q∨R
Q→(P→R) →^Q∨(^P∨R)→^Q∨^P∨R
3. Find the principal disjunctive normal form of the formula: construct the truth table; Find by equivalent formula
4. (1)P(x): real number, Q(x): rational number (x exists) (p (x) → q (x))
(2)P(x): people, Q(x): making mistakes; ((X exists) (p (x) ∧ q (x)))
The "existence" symbol can't be typed, I hope everyone understands.
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