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(1)解一元一次不等式和解一元一次方程相類似,但要特別注意不等式的兩邊都乘以(或除以)同一個負數時,不等號的方向必須改變.(2)解不等式組一般先分別求出不等式組中各個不等式的解集,再求出它們的公共部分,就得…
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