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Let D={8,14}D = \{8, 14\} and E={0,4,18}E = \{0, 4, 18\}. What is DED \cap E?\newlineChoices:\newline(A) {0}\{0\}\newline(B) {0,4,8,14,18}\{0, 4, 8, 14, 18\}\newline(C) {0,4,8,18}\{0, 4, 8, 18\}\newline(D) \emptyset

Full solution

Q. Let D={8,14}D = \{8, 14\} and E={0,4,18}E = \{0, 4, 18\}. What is DED \cap E?\newlineChoices:\newline(A) {0}\{0\}\newline(B) {0,4,8,14,18}\{0, 4, 8, 14, 18\}\newline(C) {0,4,8,18}\{0, 4, 8, 18\}\newline(D) \emptyset
  1. Define Sets D and E: Define the sets D and E.\newlineD={8,14}D = \{8, 14\}\newlineE={0,4,18}E = \{0, 4, 18\}\newlineThe intersection of two sets is the set of elements that are common to both sets.
  2. Find Intersection of D and E: Find the intersection of sets DD and EE. To find DED \cap E, we look for elements that are present in both set DD and set EE. DE={elements that are in both D and E}D \cap E = \{\text{elements that are in both } D \text{ and } E\}
  3. Compare Elements of D and E: Compare the elements of set DD with the elements of set EE. We see that: - 88 is in DD but not in EE. - 1414 is in DD but not in EE. - 00 is in EE but not in DD. - EE11 is in EE but not in DD. - EE44 is in EE but not in DD. Therefore, there are no elements that are common to both sets DD and EE.
  4. Conclude Intersection of D and E: Conclude the intersection of sets DD and EE. Since there are no common elements between set DD and set EE, the intersection of DD and EE is the empty set. DE=D \cap E = \emptyset

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