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幂函数f(x)的图象过点,若f(a)=8,则a的值是( ) A. B. C. D...
幂函数f(x)的图象过点
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100733071766104/SYS201311031007330717661005_ST/0.png)
,若f(a)=8,则a的值是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100733071766104/SYS201311031007330717661005_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100733071766104/SYS201311031007330717661005_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100733071766104/SYS201311031007330717661005_ST/3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100733071766104/SYS201311031007330717661005_ST/4.png)
考点分析:
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100733071766104/SYS201311031007330717661001_ST/0.png)
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