已知f(X)是定义在区间[-1,1]上的奇函数,且f(1)=1.当a,b∈[-1,1],a+b≠0时,有[f(a)+f(b)]/(a+b)>0已知f(X)是定义在区间[-1,1]上的奇函数,且f(1)=1.当a,b∈[-1,1],a+b≠0时,有[f(a)+f(b)]/(a+b)>0(1):判断函数在其定义
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![已知f(X)是定义在区间[-1,1]上的奇函数,且f(1)=1.当a,b∈[-1,1],a+b≠0时,有[f(a)+f(b)]/(a+b)>0已知f(X)是定义在区间[-1,1]上的奇函数,且f(1)=1.当a,b∈[-1,1],a+b≠0时,有[f(a)+f(b)]/(a+b)>0(1):判断函数在其定义](/uploads/image/z/7622606-38-6.jpg?t=%E5%B7%B2%E7%9F%A5f%28X%29%E6%98%AF%E5%AE%9A%E4%B9%89%E5%9C%A8%E5%8C%BA%E9%97%B4%5B-1%2C1%5D%E4%B8%8A%E7%9A%84%E5%A5%87%E5%87%BD%E6%95%B0%2C%E4%B8%94f%281%29%3D1.%E5%BD%93a%2Cb%E2%88%88%5B-1%2C1%5D%2Ca%2Bb%E2%89%A00%E6%97%B6%2C%E6%9C%89%5Bf%28a%29%2Bf%28b%29%5D%2F%28a%2Bb%29%3E0%E5%B7%B2%E7%9F%A5f%28X%29%E6%98%AF%E5%AE%9A%E4%B9%89%E5%9C%A8%E5%8C%BA%E9%97%B4%5B-1%2C1%5D%E4%B8%8A%E7%9A%84%E5%A5%87%E5%87%BD%E6%95%B0%2C%E4%B8%94f%281%29%3D1.%E5%BD%93a%2Cb%E2%88%88%5B-1%2C1%5D%2Ca%2Bb%E2%89%A00%E6%97%B6%2C%E6%9C%89%5Bf%28a%29%2Bf%28b%29%5D%2F%28a%2Bb%29%EF%BC%9E0%281%29%3A%E5%88%A4%E6%96%AD%E5%87%BD%E6%95%B0%E5%9C%A8%E5%85%B6%E5%AE%9A%E4%B9%89)
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