Suppose that A and B are contingent sentences. What can you say about (A V B)-(AB)? (Note that A and B are metavariables)O a.It is a contingent sentenceO b. It is a tautologyOc Cannot be determinedO d. It is a contradiction

Answered: Image /qna-images/answer/795f073f-d24e-4afd-bc17-d95a44db50e2.jpg

Answered: Suppose that A and B are contingent…

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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7. Describe the following combined propositions as English sentences if s = heavy snow, C = flight canceled, and d=there are delays a. s→C b. sAc (s V c) • (d V c) e. sA (d V c) С. d d. s- 8. Convert the following expressions into DNF format (where ! is NOT) a. (x+y!z)(!x+y+!z) b. (ху)!(х+y) 9. Are the following expressions satisfiable? a. (x+y)(!x+!z)(!y+z)(x+!z+!y) b. (x+y)(!x+!z)(!y+z)(x+!z+!y)(!x+y+!z) 10. Draw circuit for the following expression !xy(!x+y)(x+y+!z)
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21. Let the following predicates be given. The domain is all computer science classes. I(r) = "x is interesting." U(x) = "x is useful." H(x, y) = “x is harder than y." M(x, y) = “x has more students than y." (a) Write the following statements in predicate logic. i. All interesting CS classes are useful. ii. There are some useful CS classes that are not interesting. iii. Every interesting CS class has more students than any non- interesting CS class. (b) Write the following predicate logic statement in everyday English. Don't just give a word-for-word translation; your sentence should make sense. (3)[I(x) A (Vy)(H(x,y)→ M(y, x))] (c) Formally negate the statement from part (b). Simplify your negation so that no quantifier lies within the scope of a negation. State which derivation rules you are using. (d) Give a translation of your negated statement in everyday English.
3. How to express the associativity of V as a tautology?

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Suppose that A and B are contingent sentences. What can you say about (A V B)-(AB)? (Note that A and B are metavariables) O a. It is a contingent sentence O b. It is a tautology Oc Cannot be determined O d. It is a contradiction