lógica Flashcards

1
Q

negação de A ^ B

A

~A v ~B

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2
Q

negação de A ↔ B

A

A ou ou B

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3
Q

negação de A → B

A

A ^ ~B (mané)

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4
Q

negação de A ou ou B

A

~A ou ou B

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5
Q

equivalência de P → Q

A

~P v Q (neymar)
~Q → ~P (troca troca nega nega)

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6
Q

equivalência P ou ou Q

A

Q ou ou P

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7
Q

equivalência de P ↔ Q

A

~ (P ou ou Q)

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8
Q

equivalência de P v Q

A

~P → Q
Q v P

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9
Q

equivalência de ~(P → Q)

A

P ^ ~Q

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10
Q

como é a tabela-verdade do “E”?

A

tudo V dá V

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11
Q

como é a tabela-verdade do “ou”?

A

tudo F dá F

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12
Q

como é a tabela-verdade do “se e somente se”?

A

vera fischer é falsa

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13
Q
A

.

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14
Q

contingência

A

V e F

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15
Q

contradição

A

só F

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16
Q

tautologia

A

só V