# Chapter 1 - Section 1.1 - Algebraic Expressions, Real Numbers, and Interval Notation - Exercise Set: 82

$True$

#### Work Step by Step

17 is in the natural numbers {1,2,3,4,5...} so the first statement is true, and for the second statement, 4 is an element of {1,2,3,4,5}. Since both of the statements are true, the answer is $true$.

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