Exercise · ZW-SET-MEMBERSHIP-003 · ★☆☆ Basic
Let \(A = \{1, 2, 3\}\). Which statement is true?
Choose one option.
Show answer
- C. \(2 \in A\)
Explanation
The elements of A are 1, 2 and 3, so 2 belongs to A. The other three are false: 4 is not there, and \(\{2\}\) and \(\{1,2\}\) are sets that are not elements of A.
Review the concept: Set membership
The relation stating that an object \(x\) is one of the elements of a set \(A\), symbolized by \(\in\).
\[x \in A\]
More practice problems: set membership
- ZW-SET-MEMBERSHIP-001 What does x ∈ A mean?
- ZW-SET-MEMBERSHIP-002 What is the negation of x ∈ A?
- ZW-SET-MEMBERSHIP-004 Let A = \∅, \1\\. Which statement is true?
- ZW-SET-MEMBERSHIP-005 Can a set contain the same element twice?
- ZW-SET-MEMBERSHIP-006 Which symbol expresses that x does not belong to A?
- ZW-SET-MEMBERSHIP-007 Let A = \∅, \∅\\. Which statement is true?
- ZW-SET-MEMBERSHIP-008 Let B = \1, \1\, \\1\\\. How many elements does B have?
- ZW-SET-MEMBERSHIP-009 Let C = \\1\, \2\, \3\\. Which statement is true?