如图,一段抛物线:y=-x(x-3)(0≤x≤3),记为C1,它与x轴交于两点O,A1;将C1绕A1旋转180°得到C2,交x轴于A2;将C2绕A2旋转180°得到C3,交x轴于A3,过抛物线C1,C3顶点的直线与C1、C2、C3围成的如图中的阴影部分,那么该面积为_____________
![](https://img.xkw.com/dksih/QBM/2019/10/15/2312737929404416/2314814333419520/STEM/8d6da990f2b243638d934787436f508d.png?resizew=227)
更新时间:2019-10-18 13:24:43
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【推荐1】在二次函数y=x2+bx+c中,函数y与自变量x之间的部分对应值如下表所示:
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【推荐2】在平面直角坐标系中点
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【推荐1】如图1,在矩形
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【推荐1】在
中,
,D是线段
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