4. Let B = {1, 2, 3, 4, 3, 2, 1}. What is |B|?

Algebra and Trigonometry (6th Edition)
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ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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**Problem 4:**
Given the set \( B = \{1, 2, 3, 4, 3, 2, 1\} \), find the cardinality of \( B \), denoted as \(|B|\).

**Explanation:**
The cardinality of a set refers to the number of distinct elements it contains. For set \( B \), list the unique elements:

- Elements in \( B \): \( \{1, 2, 3, 4\} \)

As duplicates are not counted, the unique elements are \( 1, 2, 3, \) and \( 4 \). Therefore, \(|B| = 4\).
Transcribed Image Text:**Problem 4:** Given the set \( B = \{1, 2, 3, 4, 3, 2, 1\} \), find the cardinality of \( B \), denoted as \(|B|\). **Explanation:** The cardinality of a set refers to the number of distinct elements it contains. For set \( B \), list the unique elements: - Elements in \( B \): \( \{1, 2, 3, 4\} \) As duplicates are not counted, the unique elements are \( 1, 2, 3, \) and \( 4 \). Therefore, \(|B| = 4\).
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