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2x+1/x-3小于等于1的解集 为x+4 x-3 这个x+4是怎么算出来的,求步骤要详细
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2020-08-01 · 知道合伙人教育行家
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(2x+1)/(x-3)<1
移项:
(2x+1)/(x-3)-1<0
(2x+1)/(x-3)-(x-3)/(x-3)<0
[(2x+1)-(x-3)]/(x-3)<0
(2x+1-x+3)/(x-3)<0
(x+4)/(x-3)<0
-4<x<3
移项:
(2x+1)/(x-3)-1<0
(2x+1)/(x-3)-(x-3)/(x-3)<0
[(2x+1)-(x-3)]/(x-3)<0
(2x+1-x+3)/(x-3)<0
(x+4)/(x-3)<0
-4<x<3
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