一道高中解析几何的题哪里错了?抛物线y^2=2px的准线的方程为x=-2,该抛物线上的每个点到准线x=-2的距离都与到定点N的距离相等,圆N是以N为圆心,同时与直线l1:y=x和l2:y=-x相切的圆.问:是否存

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