1.函数f(x)对任意的m,n属于R都有f(m+n)=f(m)+f(n)-1,并且当x大于0时f(x)大于1,(1)求证f(x)在R上是增函数;(2)若f(3)=4,解不等式f(a^2+a-5)1),(1)证明函数f(x)在(-1,+无穷)上
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![1.函数f(x)对任意的m,n属于R都有f(m+n)=f(m)+f(n)-1,并且当x大于0时f(x)大于1,(1)求证f(x)在R上是增函数;(2)若f(3)=4,解不等式f(a^2+a-5)1),(1)证明函数f(x)在(-1,+无穷)上](/uploads/image/z/9870370-34-0.jpg?t=1.%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%E5%AF%B9%E4%BB%BB%E6%84%8F%E7%9A%84m%2Cn%E5%B1%9E%E4%BA%8ER%E9%83%BD%E6%9C%89f%EF%BC%88m%2Bn%EF%BC%89%3Df%EF%BC%88m%EF%BC%89%2Bf%EF%BC%88n%EF%BC%89-1%2C%E5%B9%B6%E4%B8%94%E5%BD%93x%E5%A4%A7%E4%BA%8E0%E6%97%B6f%EF%BC%88x%EF%BC%89%E5%A4%A7%E4%BA%8E1%2C%EF%BC%881%EF%BC%89%E6%B1%82%E8%AF%81f%EF%BC%88x%EF%BC%89%E5%9C%A8R%E4%B8%8A%E6%98%AF%E5%A2%9E%E5%87%BD%E6%95%B0%EF%BC%9B%EF%BC%882%EF%BC%89%E8%8B%A5f%EF%BC%883%EF%BC%89%3D4%2C%E8%A7%A3%E4%B8%8D%E7%AD%89%E5%BC%8Ff%EF%BC%88a%5E2%2Ba-5%EF%BC%891%29%2C%281%29%E8%AF%81%E6%98%8E%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%E5%9C%A8%EF%BC%88-1%2C%2B%E6%97%A0%E7%A9%B7%EF%BC%89%E4%B8%8A)
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