高中数学代数与函数一其他练习题111
题目内容

若实数x,y满足 http://picflow.koolearn.com/upload/papers/20140824/201408240401388781056.png则x 2-2xy+y 2的取值范围是(  )

2021-07-19

A.[0,4]

B.[0,http://picflow.koolearn.com/upload/papers/20140824/20140824040138894368.png]

C.[4,http://picflow.koolearn.com/upload/papers/20140824/20140824040138894368.png]

D.[0,http://picflow.koolearn.com/upload/papers/20140824/20140824040138925310.png]

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