如图,直角梯形OABC中,OC∥AB,C(0,3),B(4,1),以BC为直径的圆交x轴于E,D两点(D点在E点右方)。(1)求点E,D的坐标;(2)求过B,C,D三点的抛物线的函数关系式;(3)过B,C,-九年级数学
题文
如图,直角梯形OABC中,OC∥AB,C(0,3),B(4,1),以BC为直径的圆交x轴于E,D两点(D点在E点右方)。 |
(1)求点E,D 的坐标; (2)求过B,C,D三点的抛物线的函数关系式; (3)过B,C,D三点的抛物线上是否存在点Q,使△BDQ是以BD为直角边的直角三角形?若不存在,说明理由;若存在,求出点Q的坐标。 |
答案
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