All real numbers at least 3 units from -2

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asked Aug 15, 2018 137k views

2 Answers

Kotte · Answer 1 · 2018-08-17T02:12:41+0000

Such numbers are divided into two sets.
The first set is (-infinity, -5]. All numbers in this set are 3 or more units from -2.
The second set is [1, infinity). Same reasoning.
Drawing a diagram might help you understand this problem better.

All real numbers at least 3 units from -2

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