Back to 1.1 Basic Set Concepts

1.1 Exercise 17

Avg difficulty 2.5

Classify each of the following sets as infinite or finite.

  1. E={2,4,6,8,10}E = \left\{2 , 4 , 6 , 8 , 10\right\}
  2. AA is the set of lowercase letters of the English Alphabet, A={a,b,c,…,z}A = \left\{a , b , c , \ldots , z\right\}.
  3. ℚ={ pq|pandqareintegersandq≠0 }\mathbb{Q} = \left\{\frac{p}{q} \left|\right. p and q are integers and q \neq 0\right\}

OpenStax Contemporary Mathematics, 1.1 Basic Set Concepts, exercise 17

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