Show that if A, B, and C are sets, then|A ∪ B ∪ C| = |A| + |B| + |C| − |A ∩ B| − |A ∩ C| − |B ∩ C| + |A ∩ B ∩ C|.

Q: Give examples of sets A, B and C such that: (a) A ∈ B and B ∈ C, and A /∈ C (b) A ∈ B and B ∈ C, and…

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Q: If A and B are finite sets, then A ∪ B is also a finite set

A: Let A and B are finite sets. We need to show that , A ∪ B is also finite set. case 1) If A = B = ϕ A…

Q: (3) For sets A, B, and C in some universal set U, prove or disprove the following. (a) AnC = B nC =A…

A: Explanation A and B:

Q: Prove: If A,B and C are sets, then A ×(B ∪C) = (A ×B)∪(A ×C).

A:

Q: If A and B are sets, and A = B, then A and B cannot be disjoint. True False

A: Given that If A and B are sets and A=B then A and B cannot be disjoint.

Q: 1. example of sets A and B for which A B but Ag B.

A: Cardinality of a set is number of elements in the set.

Q: Prove that if A1,A2,…,An and B are sets, then (A1−B)∪(A2−B)∪⋯∪(An−B)=(A1∪ A2 ∪⋯∪ An)−B.

A: To Prove- Prove that if A1, A2, ...., An and B are sets, then A1 - B ∪ A2 - B ∪ .... ∪ An - B = A1 ∪…

Q: Prove that if A and B are sets, then P(A) U P (B) C P(AUB).

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Q: Let A, B be any sets with ACB. Then* |P(B × B)| > |P(Ā × B)| O None of these the above is true |P(A…

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Q: Let A and B be sets. Prove or disprove: P(A × B) = P(A) × P(B).

A: We have to prove or disprove given result: m

Q: If A and B are two sets such that A ⊂ B, then what is A ∪ B ?

A: Let us understand it by and example,   Let, A={1,2,3} and B={1,2,3,4,5} Here we can see that A ⊂ B

Q: If A and B are non-empty sets defined on a universal set U. and An B = Ø, then A\B is equal to

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Q: If A and B are sets such that A C B then A × BC B × B. O true false

A: True.

Q: Let A, B, and C be non-empty sets. Then Cx BxA=C×A×B if and only if O A=B O A=B=C O None of these O…

A: We can tackle this problem easily by assuming some examples  case (i) Let A=B=C = {1,2} we have,…

Q: Let A, B, and C be subsets of a universal set U. Suppose n(U) = 80, n(A) = 20, n(A∩B) = 5, n(C) =…

A: Given, n(A) = 20, n(A∩B) = 5, n(A u B)= 40

Q: Let C and D be subsets of a universal set U, then (C ∪ D) ⊆ (C ∩ D).

A: Given C and D are two subsets of universal set U.

Q: A set is not open if its complement is not closed. O True O False

A: To find the given statement is true or false .

Q: Let A and B be subsets of a universal set U and suppose n(U) = 400, n(A) = 150, n(B) = 90, and n(A ∩…

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Q: 2. Let A, B, and C be sets. with (A - B)nC the empty set. Prove that AnC C B.

A: Recall the following. A-B=A∩BcIf x∈A⇒x∈B, then A⊂B

Q: 4. Let A and B be sets, prove that P(A)UP(B) C P(AUB).

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Q: Let A, B, and C be non-empty sets. Then A×B×C=A×C×B if and only if

A: A, B, C are three non empty sets,  And, it is given that A × B × C = A × C × B

Q: 2. Let C and D be subsets of a universal set U, then 2, (C ∩ D) ⊆ (C4D).

A: False

Q: Let A, B, and C be sets. Show that (A-B)-C=(A-C)-(B -C).

A: A, B, C are any set, we need to show that (A-B) - C = (A-B) - (A-C) this can be done using the…

Q: If A, B, and C are sets such that A ∩ B ≠ Ø and B ∩ C ≠ Ø, then A ∩ C ≠ Ø

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Q: 4. Let A and B be any two non-empty sets. Prove that P(ANB) = P(A)NP(B).

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Q: 12. Find two sets A and B such that A e B and A B.

A: 12.Find two sets A and B such that A∈B and A⊑B

Q: Let A be an uncountable set and let B be the set of real numbers that divides A into two uncountable…

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Q: Prove or disprove that for all sets A, B, and C, we have a) A × (B ∪ C) = (A × B) ∪ (A × C). b) A ×…

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Q: Can you conclude that A = B if A, B, and C are sets such thata) A ∪ C = B ∪ C? b) A ∩ C = B ∩ C?c) A…

A: According to the given information, it is required to conclude that A = B if A,B,C are sets such…

Q: If A, B and C are sets such that; A ∆ B = A ∆ C, then   B is a subset of C        Select one: A.…

A: The meaning of A ∆ B is A ∆ B = (A u B) - (A n B) So A ∆ B contains that elements from set A and set…

Q: Show that if A and B are sets, then P(A) u P(B) c P(A u B), where P(A) denotes the power set of A

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Q: 2. Determine if the following statements are true or false. Here A represents any set. (a) ¢ C A (b)…

A: Used simple logic to prove.

Q: Let A, B, and C be non-empty sets. Then C×B×A=C×A×B if and only if * O None of these O A=C O B=c O…

A: A, B, and C are non empty sets

Q: If A and B are sets containing finitely many elements, then |A x B| =|B x A|.

A:

Q: Let A and B be subsets of a universal set U and suppose n(U) = 300, n(A) = 150, n(B) = 120, and n(A…

A: We have given the following n(U) = 300, n(A) = 150, n(B) = 120, and n(A ∩ B) = 60.

Q: Prove or disprove the following statement: Let A, B, X be sets. If X ⊆ A ∪ B, then X ⊆ A or X ⊆ B.

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Q: Let A. B. and C be non-empty sets. Then A B C=C×B×A if and only if* O B=C O None of these O A=C O…

A: Let us consider four non empty sets A, B, C and D such that A x B=C x D if and only if A=C and  B=D…

Q: Let A, B, and C be non-empty sets. Then AXBXC=A×C×B if and only if * O None of these O A=C O B=C O…

A: B=C

Q: Show that if A and B are sets |A| = |B|, then |P(A)| = |P(B)|

A:

Q: Let A and B be sets. Prove or disprove: P(A\B) = P(A) \ P(B).

A: Given A and B be sets. Prove or disprove PA−B=PA−PB. Let us consider an example  A=1,2,3,4 and…

Q: Let U be a universal set, and suppose A and B are subsets of U. (a) How are (x ∈A →x ∈B) and (x…

A: let U be a universal set and suppose A and B are subsets of U. (a) x∈A→x∈B and x∈Bc→x∈Ac are they…

Q: Let A, B, and C be non-empty sets. Then C×B×A=C×A×B if and only if * O None of these O A=C B=C A=B=C…

A: Given :- A, B and C are three non empty sets. To complete the statement. C*B*A = C*A*B if and only…

Q: Let A, B be any sets with BCA. Then |P(B×B)[s|P(A×B)| O IP(AxB)|s|P(B×B)| O IP(AxB)|=|P(B×B)| O None…

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Q: Let A and B be sets. Then B (B – A) -

A: Complement of set A =1-A

Q: 3. Consider three finite sets A, B and C. Show that: (a) (b) (c) (AB) x C = (A ×C) \ (B × C ); (AUB)…

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Q: Let A and B be sets. Prove that (A − B) ∩ (B − A) = ∅.

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Q: Let A, B, and C be sets. Prove A × (B\C) = (A × B)\(A × C).

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Set Theory

Every field in the present world involves a set. The theory of sets was developed by German mathematician Georg Cantor while working on the “problems of trigonometric series”.