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The cardinal number of a set

publish date: 2022/07/03 23:05:00 GMT+10

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If a set A contains finite number of elements n, we denote the cardinal number of set A by n(A).  In other words, n(A) stands for the number of elements in a finite set.

What are the cardinal number for each of the following sets?

  1. A = {1, 3, 4, 5, 6, 7}
  2. B = {a, b, c, d, e, f, g, h}
  3. C = {2, 4, 6, 8, 10}

Correct Answer

(1) 6
(2) 8
(3) 5

Reference

Introduction to Differential Calculus (Systematic Studies with Engineering Applications for Beginners) - 2012

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