1. Let our domain be the natural numbers greater than 1. Define:P(x)= " is prime"Q(x, y) = "x divides y"Consider the following statement:For every x that is not prime, there is some prime y that divides it.33sigrament you agree(a) Write the statement in predicate logic.(b) Negate your statement from part (a).(c) Write the English translation of your negated statement. Your statement should sound like English not predicate logicin words.(d) Write the following statement using the given predicates: "There is exactly one prime number that is even.". You maynot use the special quantifier 3! for exactly one...2. Give an example of a domain U and predicates P and Q such that

Answered: Image /qna-images/answer/49f0a073-8ab7-4266-95b0-f97bb6bd020d.jpg

Answered: 1. Let our domain be the natural…

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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Rewrite the following statements and their negations using quantifiers and symbols. Then, argue whether the statement or its negation is true by proving the statement or by finding a counterexample. (a) There is a rational number which is greater than its square root. i. Original statement: ii. Negation: iii. Which is true and why? (b) Each integer has the property that its square is less than or equal to its cube. i. Original statement: ii. Negation: iii. Which is true and why? (c) Every element in the set {0, 1,2} is greater than or equal to half of its square. i. Original statement: ii. Negation: iii. Which is true and why?
Consider the following predicate, where the domain of x and y is the set of all integers: Q(x, y) : x - y = 3 Determine the truth values of each of the following expressions. ¡¡ x\yQ(x, y) Q(4,1) Q(7,4) VxyQ(x,y) Q(4,7) 1. True 2. False
Express this in predicate logic: Each email address has exactly one email box. M(x): x is an email address B(x,y): x has an email box y
3. Is the statement ~(p V q) the logical equivalent of p →q ? Use a truth table to demonstrate your answer. Skip no Columns. Evaluate the truth value of the statements. Justify your answer. a) ax[(x < 0) → (3x² < 0)] b) Vx[(x – 62 2) V (x < 1)] Write an equivalent statement in terms of or "OR" or "AND" for r → s without using the → symbol.
Let M(x,y) be the predicate "person x has seen movie y," where the domain for x is the set of all people and the domain for y is the set of all movies. Express the following English sentence as a symbolic proposition: "There is a movie that has not been seen by any people." x-M(x,y) ⒸyVx-M(x, y) x-M(x,y) yx M(x,y) -
3. For the following, choose the sentences that are statements. For those that are statements, write the truth values next to the sentence to the best of your knowledge. (a) Today is Thursday. (b) What time is it?(c) Where is the post office? (d) |x|2+ 1 = x2+ 1 for every real numbers x.
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.
Express the following statements in predicate logic: Some human is not mortal. For every x and every y there exists a z which is the sum of x and y. There is no prime number between 23 and 29.
5. Consider the following: All numbers that end with a zero are divisible by 10. All numbers divisible by10 are divisible by 5. Therefore, every number that ends with a zero is divisible by 5.(a) Is this an argument? Why or why not? (b) Define your variables and write this argument as a sequence of premises in a form of implication,followed by a conclusion. (c) Is this argument valid? Prove using truth tables and by recognizing the rule of inference
2. Let P(x) be "x is a student in this class," Q(x) be “x knows how to write programs in Python," and R(x) be “x can get a good job," where the domain of x consists of all people. Write the following argument in argument form and use the rules of inference to show that the argument is valid. Tom is a student in this class. Tom knows how to write programs in Python. Everyone who knows how to write programs in Python can get a good job. Therefore, some student in this class can get a good job.
Share your work would help tremendously.
4. Write the negation of the following statements. Use number lines where necessary. Define variables ifneeded.(a) Every odd integer is prime (b) I hate onions but I love sushi (c) -3 ≤ x ≤ 3

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