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Given sets A = 2, 3, 5, 7, B = 2, 3, 4, 5, 6, 7, 8, 9, and C = 1, 4, 9, 16, 25, 36, find (A ∪ B) ∩ C and (A ∩ B) ∪ C.

Mathematics

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Answers

3 parts
iii

{2,3,4,5,6,7,8,9}\{2, 3, 4, 5, 6, 7, 8, 9\}

iv

{4,9}\{4, 9\}

v

{1,2,3,4,5,7,9,16,25,36}\{1, 2, 3, 4, 5, 7, 9, 16, 25, 36\}

Step-by-step solution

5 steps

First, let's list the given sets:
A={2,3,5,7}A = \{2, 3, 5, 7\}
B={2,3,4,5,6,7,8,9}B = \{2, 3, 4, 5, 6, 7, 8, 9\}
C={1,4,9,16,25,36}C = \{1, 4, 9, 16, 25, 36\}

Part iii· 1 step

Find A∪BA \cup B.

  1. Identify all unique elements present in either set A or set B.

    A∪B={x∣x∈A or x∈B}A \cup B = \{x \mid x \in A \text{ or } x \in B\} A∪B={2,3,4,5,6,7,8,9}A \cup B = \{2, 3, 4, 5, 6, 7, 8, 9\}

    The union of A and B is {2,3,4,5,6,7,8,9}\boxed{\{2, 3, 4, 5, 6, 7, 8, 9\}}.

Part iv

{4,9}\{4, 9\}

Find (A∪B)∩C(A \cup B) \cap C.

  1. Use the result from part (iii) for A∪BA \cup B.

    A∪B={2,3,4,5,6,7,8,9}A \cup B = \{2, 3, 4, 5, 6, 7, 8, 9\} C={1,4,9,16,25,36}C = \{1, 4, 9, 16, 25, 36\}
  2. Identify elements common to both (A∪B)(A \cup B) and CC.

    (A∪B)∩C={x∣x∈(A∪B) and x∈C}(A \cup B) \cap C = \{x \mid x \in (A \cup B) \text{ and } x \in C\}

    The common elements are 4 and 9.

    (A∪B)∩C={4,9}(A \cup B) \cap C = \{4, 9\}

    The intersection of (A∪B)(A \cup B) and CC is {4,9}\boxed{\{4, 9\}}.

Part v

{1,2,3,4,5,7,9,16,25,36}\{1, 2, 3, 4, 5, 7, 9, 16, 25, 36\}

Find (A∩B)∪C(A \cap B) \cup C.

  1. First, find the intersection of A and B, A∩BA \cap B.

    A={2,3,5,7}A = \{2, 3, 5, 7\} B={2,3,4,5,6,7,8,9}B = \{2, 3, 4, 5, 6, 7, 8, 9\} A∩B={x∣x∈A and x∈B}A \cap B = \{x \mid x \in A \text{ and } x \in B\}

    The common elements are 2,3,5,72, 3, 5, 7.

    A∩B={2,3,5,7}A \cap B = \{2, 3, 5, 7\}
  2. Now, find the union of (A∩B)(A \cap B) and CC.

    A∩B={2,3,5,7}A \cap B = \{2, 3, 5, 7\} C={1,4,9,16,25,36}C = \{1, 4, 9, 16, 25, 36\} (A∩B)∪C={x∣x∈(A∩B) or x∈C}(A \cap B) \cup C = \{x \mid x \in (A \cap B) \text{ or } x \in C\} (A∩B)∪C={1,2,3,4,5,7,9,16,25,36}(A \cap B) \cup C = \{1, 2, 3, 4, 5, 7, 9, 16, 25, 36\}

    The union of (A∩B)(A \cap B) and CC is {1,2,3,4,5,7,9,16,25,36}\boxed{\{1, 2, 3, 4, 5, 7, 9, 16, 25, 36\}}.

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