如图,平面直角坐标系中,四边形OABC为直角梯形,CB∥OA,∠OCB=90°,CB=1,AB=更号5,直线y=-1/2x+1过A点与y轴交于D点.(1)求点A,点B的坐标;(2)试说明:AD⊥BO;(3)若点M是直线AD上的一个动点,在x轴
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![如图,平面直角坐标系中,四边形OABC为直角梯形,CB∥OA,∠OCB=90°,CB=1,AB=更号5,直线y=-1/2x+1过A点与y轴交于D点.(1)求点A,点B的坐标;(2)试说明:AD⊥BO;(3)若点M是直线AD上的一个动点,在x轴](/uploads/image/z/4322043-27-3.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%B9%B3%E9%9D%A2%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%E4%B8%AD%2C%E5%9B%9B%E8%BE%B9%E5%BD%A2OABC%E4%B8%BA%E7%9B%B4%E8%A7%92%E6%A2%AF%E5%BD%A2%2CCB%E2%88%A5OA%2C%E2%88%A0OCB%3D90%C2%B0%2CCB%3D1%2CAB%3D%E6%9B%B4%E5%8F%B75%2C%E7%9B%B4%E7%BA%BFy%3D-1%2F2x%2B1%E8%BF%87A%E7%82%B9%E4%B8%8Ey%E8%BD%B4%E4%BA%A4%E4%BA%8ED%E7%82%B9.%EF%BC%881%EF%BC%89%E6%B1%82%E7%82%B9A%2C%E7%82%B9B%E7%9A%84%E5%9D%90%E6%A0%87%EF%BC%9B%EF%BC%882%EF%BC%89%E8%AF%95%E8%AF%B4%E6%98%8E%EF%BC%9AAD%E2%8A%A5BO%EF%BC%9B%EF%BC%883%EF%BC%89%E8%8B%A5%E7%82%B9M%E6%98%AF%E7%9B%B4%E7%BA%BFAD%E4%B8%8A%E7%9A%84%E4%B8%80%E4%B8%AA%E5%8A%A8%E7%82%B9%2C%E5%9C%A8x%E8%BD%B4)
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