1. Use set identities or different proof method to show that: a) (B–A)U(C – A) = (BUC)-A b) (A-C)n(C − B) = Ø

Q: Give a direct proof of the theorem: “if x and y are odd integers, then x + y is even.”  DISCRETE…

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Q: Complete the proof: If A≤B and B≤C, then ACCn(transitive property for set in inclusion) Need to…

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Q: 3. (10 points) a) Use an element proof to prove the following: for all sets A and B, А — (Аn B) %3DА…

A: The detailed solution is as follows below:

Q: Simplify Z = [(PNR) u ā] n (PU Q) n P - R using set identities Q]

A: Set Identities:-Commutative law:- A∩B=B∩A  and  A∪B=B∪AAssociative law:-   A∩(B∩C)=(A∩B)∩C  and…

Q: Show that If (A ∩ B = ø) then P (A ∪ B) = P (A) + P (B)

A: Given that A ∩ B = ø This means P(A ∩ B ) = 0

Q: Is the following true or false? Z∩N=Z

A: Z is the set of all integers, i.e.  Z={ ..., -3, -2, -1, 0, 1, 2, 3, ...} And N is the set of all…

Q: determine which of the followingmatrices are nonsingular:

A: Given, 1322141-72 We say that a matrix is singular if its determinant is zero otherwise we say it is…

Q: Prove: For all sets A, B and C, (AUB) - (CA) = AU (B-C).

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Q: a. Vitali Theorem

A: a) Here, the Vitali Theorem has to be defined and it is also defined as a fundamental result in…

Q: Prove R is irreflexive iff R ∩ idA = ∅. If idA={ ∈ A x A |a=b}

A: In the given question we have to prove that a relation R defined on a set A is said to be…

Q: Let a, b, q, r E Z and assume that a and b are not both zero and b and r are not both zero. Show…

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Q: Let f AB, prove the following: (a) if S, T are subsets of A, then f(SNT) ≤ f(S) nf(T); (b) if U, V…

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Q: Prove: If = ¿ (where a, b, c, and d are nonzero), b then d*

A: Given:               ab=cd  (where a,b,c  and d are non zero.)

Q: a) Let A = {4, 7, 8} and B = {−1, 5}, Find and compare sup(A+B) , inf(A+B), sup(A)+sup(B),sup A -…

A: See the attachment

Q: Use a direct proof technique to prove the following theorems: For all integers r and y, r + y - 3 is…

A: We have to prove that , For all integers x and y , x2+y2-3 is not divisible by 4. We will have 3…

Q: 5. Consider the following statement: For all sets A, B, and C, then AU (BNC) = (AUB) nC. Either…

A: Let value of set A,set B and set C are respectively. A={1,2,3,6,7} B={3,7,8,9} C={2,3,6,9}

Q: ∃x ∈ D such that ∀y ∈ E, x + y = 1 Negation:

A: We need to find the negation of  ∃x ∈ D such that ∀y ∈ E, x + y=1

Q: x + y)(z + w) = xz + xw + yz + yw A.) Explain in your own words what this problem is asking. B.)…

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Q: (3) Use an element proof to prove that for all sets A, B, C, and D, if An C =0 then (A x B)n (C x D)…

A: The proof of the given statement is given in the explanation part.Explanation:Steps and explanations…

Q: According to Bayes' Theorem, letting p = P(A), q = P(B), r = P(A|B), we can express P(B|A) as...…

A: Given that P(A) = p P(B) = q P(A | B) = r

Q: Show that the following two sentences are not equivalent in FOL : ¬∀x(A(x) → ¬B(x)), ∀x(A(x) →…

A: Introduction: In logical reasoning, two statements are referred to as logically equivalent if their…

Q: Name the set identity that is used to justify each of the identities given (a) (BNC) UBNC=U (b) AU…

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Q: Prove that |A U B| + |A n B| = |A| + |B|

A: Let A and B are two sets. A = number of elements in the set A. B = number of elements in the set B.…

Q: If a1, az, az,.-ans. be the A.P. and S, = a-1m+1+a-1m+2+a-1n+3 +.--+ am %3D Prove that :…

A: In this question we have to proof S1, S2, S3,.... are in Arithmetic Progression.

Q: Let u, v E Z. Show using only the definition of a divisor and algebraic properties that if 7|u and…

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Q: A = ({0} U {x |x € Z* and x < 4}), В 3 30, 1, 3, 5, 7}, and C = ({0} U{x| x E Z* and x is even and x…

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Q: Write a proof for the following statement: (Use direct, contrapositive, or proof by contradiction.)…

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Q: Let A = {0, {0}, {Ø, {Ø}}}. State whether each of the following statements is true or false: ØCA {0,…

A: Given A=ϕ,ϕ,ϕ,ϕ

Q: Let a, b, d E Z. Prove using only the definition of divisibility (that is, no other lemmas or…

A: Solution:- It is given that ,    a , b , d ∈ℤ then , we have to prove that  If     d /  a   and  d /…

Q: 1. The greatest common divisor c, of a and b, denoted as c = gcd(a, b), is the largest number that…

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Q: (c) Using the set identities, prove that (A – B) n (A – C) = A – (B U C).

A: To Prove: A-B∩A-C=A-B∪C

Q: . Consider the statement: Let A, B ∈ Z. If 6|A and 10|B, then 4|(A2 + B2). (a) Prove the statement.…

A: 5. Consider the statement: Let A, B ∈ Z. If 6|A and 10|B, then 4|(A^2 + B^2). (a) Prove the…

Q: Prove the following statement in three different ways, using a direct proof, a contrapositive proof…

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Q: Which of the following statements is (are) true for (x) = 2(x - 1)(x - 2)(x+ 3)? i) as x-o, y-c0 ii)…

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Q: 1. List a pair of zero divisors of (M₂(Z), +, ×):

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Q: looc 7. Given sets A, B and C prove or disprove that (AB) U (B-C) = U (B-C) = (A-C)_

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Q: Prove the following set identities: (a) (AUB) nC = (ANC) U (BNC); (b) (AUB)-C=(A-C) U (B-C); (c)…

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Q: Prove the following statements: i. {x €R : |x – 4| = 2|x| – 2} ={-6,2}

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Q: Show that ∗ : R × R → R given by           a ∗ b → a + 2b is not associative.

A: Given:Show that ∗: R × R → R given by           a ∗ b → a + 2b is not associative.