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九年级数学：当△PBC面积最大时，怎么求P点的坐标？二次函数中考
九年级数学：当△PBC面积最大时，怎么求P点的坐标？二次函数中考
九年级数学，二次函数专题，中考压轴题每天一练，培优专题224/287
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