## Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole

# Chapter 1 - Section 1.1 - Real Numbers - 1.1 Exercises: 44

#### Answer

a.) $A \cup B \cup C = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]$ b.) $A\cap B\cap C = \emptyset$

#### Work Step by Step

$Find$ $the$ $indicated$ $set$ $if:$ $A = [1, 2, 3, 4, 5, 6, 7]$ $B = [2, 4, 6, 8]$ $C = [7, 8, 9, 10]$ a.) $A \cup B \cup C$ We find the union of the variables for A, B, and C. Place the units in chronological order $A \cup B \cup C = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]$ b.) $A \cap B \cap C$ We find what units in A, B, and C intercept each other. We determine that there is no unit available intercept at all for A, B, and C together. $A\cap B\cap C = \emptyset$

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