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5除以X+1大于等于1
人气:481 ℃ 时间:2021-03-04 04:06:39
解答
5/(x+1)>=1
5/(x+1)-1>=0
(5-x-1)/(x+1)>=0
(4-x)/(x+1)>=0
(4-x)(x+1)>=0
(x-4)(x+1)<=0
-1<=x<=4
分母不等于0
所以-1
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