顶点在原点,焦点在y轴的正半轴的抛物线的焦点到准线的距离为2.
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顶点在原点,焦点在y轴的正半轴的抛物线的焦点到准线的距离为2.
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已知抛物线的顶点在原点,焦点在x轴的正半轴,且过点(2,4).
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你能帮帮他们吗
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