集合U={(x,y)丨x∈R,y∈R},M={(x,y)丨丨x丨+丨y丨<a},P={(x,y)丨y=f(x),现给出下列函数:①y=a^x②y=loga x③y=sin(x+a)④y=cos ax,若0<a<1时,恒有P∩CUM=P,则所有满足条件的函数f(x)
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![集合U={(x,y)丨x∈R,y∈R},M={(x,y)丨丨x丨+丨y丨<a},P={(x,y)丨y=f(x),现给出下列函数:①y=a^x②y=loga x③y=sin(x+a)④y=cos ax,若0<a<1时,恒有P∩CUM=P,则所有满足条件的函数f(x)](/uploads/image/z/14583023-71-3.jpg?t=%E9%9B%86%E5%90%88U%3D%EF%BD%9B%EF%BC%88x%2Cy%EF%BC%89%E4%B8%A8x%E2%88%88R%2Cy%E2%88%88R%EF%BD%9D%2CM%3D%EF%BD%9B%EF%BC%88x%2Cy%EF%BC%89%E4%B8%A8%E4%B8%A8x%E4%B8%A8%2B%E4%B8%A8y%E4%B8%A8%EF%BC%9Ca%EF%BD%9D%2CP%3D%EF%BD%9B%EF%BC%88x%2Cy%EF%BC%89%E4%B8%A8y%3Df%EF%BC%88x%EF%BC%89%2C%E7%8E%B0%E7%BB%99%E5%87%BA%E4%B8%8B%E5%88%97%E5%87%BD%E6%95%B0%EF%BC%9A%E2%91%A0y%3Da%5Ex%E2%91%A1y%3Dloga+x%E2%91%A2y%3Dsin%EF%BC%88x%2Ba%EF%BC%89%E2%91%A3y%3Dcos+ax%2C%E8%8B%A50%EF%BC%9Ca%EF%BC%9C1%E6%97%B6%2C%E6%81%92%E6%9C%89P%E2%88%A9CUM%3DP%2C%E5%88%99%E6%89%80%E6%9C%89%E6%BB%A1%E8%B6%B3%E6%9D%A1%E4%BB%B6%E7%9A%84%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89)
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