Chapter 2 - Set Theory - 2.1 Basic Set Concepts - Exercise Set 2.1 - Page 59: 89

a. yes b.yes

$A = \{x|x ∈ N$ and $100 \leq x \leq 105\}$ $B = \{x|x ∈ N$ and $99 \lt x \lt 106\}$ Expressed using the roster method: $A = \{100, 101, 102, 103, 104, 105\}$ $B = \{100, 101, 102, 103, 104, 105\}$ a. Those sets are equivalent as they have the same number of elements. b. Those sets are equal, as their elements are exactly the same.