OpenStax, Contemporary Mathematics §1.1 Basic Set Concepts · Example 9 · Combinatorics · Sets & logic

Basic Set Concepts · Example 9

Classify each of the following sets as infinite or finite.

(a) $E = {2, 4, 6, 8, 10}$
(b) $A$ is the set of lowercase letters of the English Alphabet, $A = {a, b, c, \dots, z}$ .
(c) $Q = {\frac{p}{q} ∣ p an d q a r e in t e g er s an d q \neq = 0}$

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OpenStax, Contemporary Mathematics · §1.1 Basic Set Concepts · Example 9

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