抽象函数的基础题两道1. 函数f(x)的定义域为(0,正无穷大),对任意正实数x,y都有f(xy)=f(x)+f(y)且f(4)=2,则f(根号2)=?2.设f(x)是定义在R上的增函数,f(xy)=f(x)+f(y),第一小
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![抽象函数的基础题两道1. 函数f(x)的定义域为(0,正无穷大),对任意正实数x,y都有f(xy)=f(x)+f(y)且f(4)=2,则f(根号2)=?2.设f(x)是定义在R上的增函数,f(xy)=f(x)+f(y),第一小](/uploads/image/z/3013258-58-8.jpg?t=%E6%8A%BD%E8%B1%A1%E5%87%BD%E6%95%B0%E7%9A%84%E5%9F%BA%E7%A1%80%E9%A2%98%E4%B8%A4%E9%81%931.+%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%E7%9A%84%E5%AE%9A%E4%B9%89%E5%9F%9F%E4%B8%BA%EF%BC%880%2C%E6%AD%A3%E6%97%A0%E7%A9%B7%E5%A4%A7%EF%BC%89%2C%E5%AF%B9%E4%BB%BB%E6%84%8F%E6%AD%A3%E5%AE%9E%E6%95%B0x%2Cy%E9%83%BD%E6%9C%89f%EF%BC%88xy%EF%BC%89%3Df%EF%BC%88x%EF%BC%89%2Bf%EF%BC%88y%EF%BC%89%E4%B8%94f%EF%BC%884%EF%BC%89%3D2%2C%E5%88%99f%EF%BC%88%E6%A0%B9%E5%8F%B72%EF%BC%89%3D%3F2.%E8%AE%BEf%EF%BC%88x%EF%BC%89%E6%98%AF%E5%AE%9A%E4%B9%89%E5%9C%A8R%E4%B8%8A%E7%9A%84%E5%A2%9E%E5%87%BD%E6%95%B0%2Cf%EF%BC%88xy%EF%BC%89%3Df%EF%BC%88x%EF%BC%89%2Bf%EF%BC%88y%EF%BC%89%2C%E7%AC%AC%E4%B8%80%E5%B0%8F)
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