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如图,过抛物线y=x2-2x上一点A作x轴的平行线,交抛物线于另一点B,交y轴于点C,已知点A的横坐标为-2. (1)求抛物线的对称轴和点B的坐标; (2)在AB上任取一点P,连结OP,作点C关...
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