如图，反比例函数的图像与一次函数的图像交于点A(ｍ，2)，点B(-2,n)，一次函数图像与y轴的交点为C。（1）求一次函数解析式；（2）求△AOB的面积。（3）在x轴上有一点P,使得△OAP为等腰-九

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