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不等式4x2-4x+1≤0的解集是

发布时间:2021-07-20

A.{http://picflow.koolearn.com/upload/papers/g02/20110523/20110523172353037879.gif}

B.(-∞,http://picflow.koolearn.com/upload/papers/g02/20110523/20110523172353053879.gif)∪(http://picflow.koolearn.com/upload/papers/g02/20110523/20110523172353053879.gif,+∞)

C.R

D.http://picflow.koolearn.com/upload/papers/g02/20110523/20110523172353100858.gif

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