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Discrete Mathematics

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How many free and bounded variable(s) the following expression has? (∀x:P(x)∧ Q(x))∨(∀y:[R(y)∨S(y)]∨B(w))∧A(z)

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Choose CNF (Conjunctive Normal Formula) equivalent of the following compound statement: (¬p ∨ ¬q ) → ¬((a → ¬b) ∨ q)

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Select the correct option(s)

 

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Which of the following statements is logically equivalent to ∀x:[(P(x)∧Q(x))→R(x)]∧∀x:[(P(x)∧R(x))→Q(x)].

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Choose the valid conclusions given the following premises:

 ∃x: [P(x)∧¬Q(x)]

 ∀x: [¬R(x)→¬P(x)]

∀x: [R(x)→S(x)].

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Choose the valid conclusions given the premises. 

¬(p ∧ ¬q),

¬(¬s ∧¬t), 

¬t→(¬s ∧p)), 

(¬t ∨¬q)

 

 

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Which of the following statements is/are satisfiable?

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Which of the following represents the statement “All real numbers are complex numbers”?

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How many satisfiable assignments the following compound statement has? ( (p→q)∧(¬ q ∨r)∧(¬s→¬r) )→(¬p∨s)

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Set A has 3 elements & set B has 4 elements . The number of injections that can be defined from A into B

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