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(2009•娄底)如图,⊙O的半径为2,C1是函数y=x2的图象,C2是函数y=...
(2009•娄底)如图,⊙O的半径为2,C
1是函数y=
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x
2的图象,C
2是函数y=-
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x
2的图象,则阴影部分的面积是
.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230612528561816/SYS201310212306125285618011_ST/images2.png)
考点分析:
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