a.maths問題

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用戶126571

2008-07-25 8:25 pm

請間有冇d 網上 references
係關於a.maths d inequalities

更新1:

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回答 (1)

阿一

2008-08-04 4:46 pm

✔ 最佳答案

Linear, Absolute Value:
http://www.scribd.com/doc/3215466/Algebra-Solving-and-Graphing-Inequalities

Quadratic:
http://www.purplemath.com/modules/ineqquad.htm

2008-08-04 08:48:23 補充：
e.g.
(x > 4) and (x < 4) => No solution
(x > 4) or (x < 4) => x != 4
(x > 4) or (x > 3) => x > 3
(x > 4) and (x > 3) => x > 4

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