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【简答题】
如图所示，若一次函数y=2x-1和反比例函数 的图象都经过点A（1，1），且直线y=2x-1与y轴交于点D，与反比例函数 的另一个交点为B。 （1）求反比例函数的解析式； （2）在y轴正半轴上存在一点C，使得S △ABC =6，求点C的坐标。
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