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(2009•武汉)函数y=中自变量x的取值范围是( ) A.x≥- B.x≥ C...
(2009•武汉)函数y=
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中自变量x的取值范围是( )
A.x≥-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232711396138307/SYS201310212327113961383001_ST/1.png)
B.x≥
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C.x≤-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232711396138307/SYS201310212327113961383001_ST/3.png)
D.x≤
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232711396138307/SYS201310212327113961383001_ST/4.png)
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