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- Review of Inequalities and Absolute Value.
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- x if x ≥ O
- │x│ =
- -x if x < O
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- │x - a│ < b is the same as -b < x - a < b
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- If a < b then b > a
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- If a < b then a + c < b + c
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- If a < b then ac < bc if c > O
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- If a < b then ac > bc if c < O
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- If a < b then a/c < b/c if c > O
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- If a < b then a/c > b/c if c < O
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- If a < b then ac < bc if c > O
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- If ab > O then either a > O & b > O , or a < O & b < O
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- If ab < O then either a > O & b < O , or a < O & b > O
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- ┌─────────────────┐
- │ Common Mistakes │
- └─────────────────┘
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- Using │x│ = x instead of the definition for │x│ .
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- WRONG If a < b then -a < -b RIGHT If a < b then -a > -b .
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- This is the end of the help file. Press the ESC key to return to the quiz
- question you were doing.