函数单调性,定义在R上的函数f(x)满足:对任意实数m,n,总有f(m+n)=f(m)•f(n),且当x>0时,0<f(x)<1.判断f(x)的单调性并证明你的结论;f(x1)/f(x2)为什么等于f(x1-x2)啊?
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![函数单调性,定义在R上的函数f(x)满足:对任意实数m,n,总有f(m+n)=f(m)•f(n),且当x>0时,0<f(x)<1.判断f(x)的单调性并证明你的结论;f(x1)/f(x2)为什么等于f(x1-x2)啊?](/uploads/image/z/5347612-28-2.jpg?t=%E5%87%BD%E6%95%B0%E5%8D%95%E8%B0%83%E6%80%A7%2C%E5%AE%9A%E4%B9%89%E5%9C%A8R%E4%B8%8A%E7%9A%84%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%E6%BB%A1%E8%B6%B3%EF%BC%9A%E5%AF%B9%E4%BB%BB%E6%84%8F%E5%AE%9E%E6%95%B0m%2Cn%2C%E6%80%BB%E6%9C%89f%EF%BC%88m%2Bn%EF%BC%89%3Df%EF%BC%88m%EF%BC%89%26%238226%3Bf%EF%BC%88n%EF%BC%89%2C%E4%B8%94%E5%BD%93x%EF%BC%9E0%E6%97%B6%2C0%EF%BC%9Cf%EF%BC%88x%EF%BC%89%EF%BC%9C1%EF%BC%8E%E5%88%A4%E6%96%ADf%EF%BC%88x%EF%BC%89%E7%9A%84%E5%8D%95%E8%B0%83%E6%80%A7%E5%B9%B6%E8%AF%81%E6%98%8E%E4%BD%A0%E7%9A%84%E7%BB%93%E8%AE%BA%EF%BC%9Bf%28x1%29%2Ff%28x2%29%E4%B8%BA%E4%BB%80%E4%B9%88%E7%AD%89%E4%BA%8Ef%28x1-x2%29%E5%95%8A%3F)
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