Concept Check Let A = {1, 2, 3, 4, 5, 6}, B = {1, 3, 5,}, C = {1, 6}, and D = {4}. Find each set. a. A ∩ D b. B ∩ C c. B ∩ A d. C ∩ A

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Recall that the intersection of two sets, denoted by \(A \cap B\), is the set of all elements that are common to both sets \(A\) and \(B\).

For part (a), find \(A \cap D\) by identifying elements that are in both \(A = \{1, 2, 3, 4, 5, 6\}\) and \(D = \{4\}\).

For part (b), find \(B \cap C\) by identifying elements common to \(B = \{1, 3, 5\}\) and \(C = \{1, 6\}\).

For part (c), find \(B \cap A\) by identifying elements common to \(B = \{1, 3, 5\}\) and \(A = \{1, 2, 3, 4, 5, 6\}\). Note that since \(B\) is a subset of \(A\), this intersection will be \(B\) itself.

For part (d), find \(C \cap A\) by identifying elements common to \(C = \{1, 6\}\) and \(A = \{1, 2, 3, 4, 5, 6\}\). Since \(C\) is a subset of \(A\), this intersection will be \(C\) itself.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Set Intersection

The intersection of two sets includes all elements that are common to both sets. It is denoted by the symbol '∩'. For example, if Set A = {1, 2, 3} and Set B = {2, 3, 4}, then A ∩ B = {2, 3}.

Set Notation and Elements

Sets are collections of distinct elements, usually enclosed in curly braces {}. Understanding how to read and interpret these elements is essential for performing operations like union, intersection, and difference.

Basic Set Operations

Besides intersection, basic set operations include union (combining elements from both sets) and difference (elements in one set but not the other). Knowing these helps in manipulating and understanding relationships between sets.