ISC

Other · Multi-part · ISC · Mathematics · Sets and Functions · Sets, subsets and intervals

Problem

Let

U = \{1, 2, 3, 4, 5, 6, 7, 8, 9\}

. (1) Find the complement of

A = \{2, 3, 6, 7, 8\}

. (2) If

P = \{\text{prime numbers}\}

, is

P' = \{\text{composite numbers}\}

? Explain your answer.

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