Test 5. Choose the best letter of your answer and prove it using truth table. Write your answer on the space before the number. 1. The compound propositions p and q are called logically equivalent if...

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Extracted text: Test 5. Choose the best letter of your answer and prove it using truth table. Write your answer on the space before the number. 1. The compound propositions p and q are called logically equivalent if is a tautology. a. p + q b. рq А. - (р "q) B. ¬p ^ ¬q 2. p → q is logically equivalent to: а. А. -р b. p °¬q 3. p 'q is logically equivalent to: В. —р ^ a. ¬q → ¬p b. q → p A. ¬p → ¬q В. -р q 4. ¬(p → q) is logically equivalent to: A. ¬p → ¬q B. ¬q → ¬p a. q +p b. p + ¬q 5. p "q is logically equivalent to: (b- e d)- b. (р — -д) А. (-р > -9) В. (-р — q) а.