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数学
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不等式(x^2-1)(x^2-6x+8)>=0的解集是
人气：217 ℃ 时间：2020-06-16 16:52:15
解答
(x+1)(x-1)(x-2)(x-4)>=0
零点是-1,1,2,4
所以x<=-1,1<=x<=2,x>=4
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