设集合A={(x,y)|x^2/4+y^2/16=1},B={(x,y)|y=a^x,a>0,a≠1},则A∩B的子集的个数是
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![设集合A={(x,y)|x^2/4+y^2/16=1},B={(x,y)|y=a^x,a>0,a≠1},则A∩B的子集的个数是](/uploads/image/z/2724205-13-5.jpg?t=%E8%AE%BE%E9%9B%86%E5%90%88A%3D%7B%28x%2Cy%29%7Cx%5E2%2F4%2By%5E2%2F16%3D1%7D%2CB%3D%7B%28x%2Cy%29%7Cy%3Da%5Ex%2Ca%3E0%2Ca%E2%89%A01%7D%2C%E5%88%99A%E2%88%A9B%E7%9A%84%E5%AD%90%E9%9B%86%E7%9A%84%E4%B8%AA%E6%95%B0%E6%98%AF)
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