高中数学代数与函数一其他练习题119
题目内容

设不等式组 http://picflow.koolearn.com/upload/papers/20140823/20140823172217927630.gif表示的平面区域为 http://picflow.koolearn.com/upload/papers/20140823/20140823172217927200.gif,不等式 http://picflow.koolearn.com/upload/papers/20140823/20140823172217959448.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823172217974249.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823172217990197.gif为常数)表示的平面区域为 http://picflow.koolearn.com/upload/papers/20140823/20140823172218052206.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823172218068410.gif为平面上任意一点, http://picflow.koolearn.com/upload/papers/20140823/20140823172218083202.gif:点 http://picflow.koolearn.com/upload/papers/20140823/20140823172218068410.gif在区域 http://picflow.koolearn.com/upload/papers/20140823/20140823172217927200.gif内, http://picflow.koolearn.com/upload/papers/20140823/20140823172218146199.gif:点 http://picflow.koolearn.com/upload/papers/20140823/20140823172218068410.gif在区域 http://picflow.koolearn.com/upload/papers/20140823/20140823172218052206.gif内,若 http://picflow.koolearn.com/upload/papers/20140823/20140823172218083202.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823172218146199.gif的充分不必要条件,则 http://picflow.koolearn.com/upload/papers/20140823/20140823172218255192.gif的取值范围是

2021-07-19

A.http://picflow.koolearn.com/upload/papers/20140823/20140823172218271331.gif

B.http://picflow.koolearn.com/upload/papers/20140823/20140823172218286332.gif

C.http://picflow.koolearn.com/upload/papers/20140823/20140823172218302334.gif

D.http://picflow.koolearn.com/upload/papers/20140823/20140823172218333276.gif

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