2009年中考数学复习教材回归知识讲解+例题解析+强化训练
一元一次不等式组及其应用
◆知识讲解
1.解不等式组一般先分别求出不等式组中各个不等式的解集并表示在数轴上,再求出它们的公共部分,就得到不等式组的解集.
2.由两个一元一次不等式组成的一元一次不等式组的解集的四种情况如下表.
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不等式组
(其中a
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