Linear Equations And Inequalities Worksheet With Answers Page 14
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28Interval and Inequality Notation
Interval notation is also used to describe sets defined by single
or double inequalities, as shown in the following table.
Inequality
Interval
Graph
a ≤ x ≤ b
[a, b]
a ≤ x < b
[a,b)
a < x ≤ b
(a,b]
a < x < b
(a,b)
x ≤ a
(-∞, a]
(-∞, a)
x < a
x ≥ b
[b, ∞)
(b, ∞)
x > b
14
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