高中数学代数与函数一其他练习题98
题目内容

已知点A(3,http://picflow.koolearn.com/upload/papers/g02/20111101/20111101133037750884.gif),O是坐标原点,点P(x,y)的坐标满足http://picflow.koolearn.com/upload/papers/g02/20111101/201111011330377811339.gif,设z为http://picflow.koolearn.com/upload/papers/g02/20120228/20120228160000418873.gifhttp://picflow.koolearn.com/upload/papers/g02/20120228/20120228160000425873.gif上的投影,则z的取值范围是

2021-07-16

A.[-3,3]

B.[http://picflow.koolearn.com/upload/papers/g02/20120228/20120228155820599899.gifhttp://picflow.koolearn.com/upload/papers/g02/20111101/20111101133037875884.gif]

C.[http://picflow.koolearn.com/upload/papers/g02/20120228/20120228155820605899.gif,3]

D.[-3,http://picflow.koolearn.com/upload/papers/g02/20111101/20111101133037906884.gif]

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