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L7 Solving Inequalities;
Inequalities Involving Absolute Value
1. Open Intervals
Graphs
Interval Notation
x
a
>
a
x
b
<
<
x
b
<
2. Half-open Intervals
x
a
≥
x
b
≤
a
x
b
≤
<
3. Closed Intervals
a
x
b
≤
≤
4. All real numbers
(
)
\
x
−∞ <
< +∞

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