Which of the following sequences of symbols are well-formed formulas (wffs)? Put an ‘x’ or a ‘√’ after each sequence. Or put ‘yes’ or ‘no’ after each sequence. 1. 5 + 10 = 15 2. A & ~ B logically implies ~B 3. ~ ~ ~ A & ~ ~ A 4. ~ ( Z ⊃ (Z v Z)) 5. (A ⊃ B) v (C ≡ D) & ((E v F) ⊃ G) 6. A ⊃ (⊃ E v D) 7. A ⊃ (~A & ~ A) 8. ~A ⊃ (A v A) 9. A ⊃ A ~A 10. A ⊃ ~BB
Which of the following sequences of symbols are well-formed formulas (wffs)? Put an ‘x’ or a ‘√’ after each sequence. Or put ‘yes’ or ‘no’ after each sequence. 1. 5 + 10 = 15 2. A & ~ B logically implies ~B 3. ~ ~ ~ A & ~ ~ A 4. ~ ( Z ⊃ (Z v Z)) 5. (A ⊃ B) v (C ≡ D) & ((E v F) ⊃ G) 6. A ⊃ (⊃ E v D) 7. A ⊃ (~A & ~ A) 8. ~A ⊃ (A v A) 9. A ⊃ A ~A 10. A ⊃ ~BB
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Question
Which of the following sequences of symbols are well-formed formulas (wffs)?
Put an ‘x’ or a ‘√’ after each sequence. Or put ‘yes’ or ‘no’ after each sequence.
1. 5 + 10 = 15
2. A & ~ B logically implies ~B
3. ~ ~ ~ A & ~ ~ A
4. ~ ( Z ⊃ (Z v Z))
5. (A ⊃ B) v (C ≡ D) & ((E v F) ⊃ G)
6. A ⊃ (⊃ E v D)
7. A ⊃ (~A & ~ A)
8. ~A ⊃ (A v A)
9. A ⊃ A ~A
10. A ⊃ ~BB
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Whether the given sequence of symbols are well formed formulas or not.
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