已知集合A={x|(x,y)|y=|x-a|},B={(x,y)|(x-1)2+(y-2)2=2},若A∩B中有且只有两个元素,则实数a的范围
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![已知集合A={x|(x,y)|y=|x-a|},B={(x,y)|(x-1)2+(y-2)2=2},若A∩B中有且只有两个元素,则实数a的范围](/uploads/image/z/12512979-27-9.jpg?t=%E5%B7%B2%E7%9F%A5%E9%9B%86%E5%90%88A%3D%7Bx%7C%28x%2Cy%29%7Cy%3D%7Cx-a%7C%7D%2CB%3D%7B%28x%2Cy%29%7C%28x-1%292%2B%28y-2%292%3D2%7D%2C%E8%8B%A5A%E2%88%A9B%E4%B8%AD%E6%9C%89%E4%B8%94%E5%8F%AA%E6%9C%89%E4%B8%A4%E4%B8%AA%E5%85%83%E7%B4%A0%2C%E5%88%99%E5%AE%9E%E6%95%B0a%E7%9A%84%E8%8C%83%E5%9B%B4)
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