已知奇函数f(x)=x-b/x^2-a的定义域为R,f(1)=1/2 1.求实数a,b的值 2已知奇函数f(x)=x-b/x^2-a的定义域为R,f(1)=1/2 1.求实数a,b的值 2.若g(x)=f(x)-3^(-x)证明函数g(x)在(-∞,+∞)上有零点
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![已知奇函数f(x)=x-b/x^2-a的定义域为R,f(1)=1/2 1.求实数a,b的值 2已知奇函数f(x)=x-b/x^2-a的定义域为R,f(1)=1/2 1.求实数a,b的值 2.若g(x)=f(x)-3^(-x)证明函数g(x)在(-∞,+∞)上有零点](/uploads/image/z/1265303-47-3.jpg?t=%E5%B7%B2%E7%9F%A5%E5%A5%87%E5%87%BD%E6%95%B0f%28x%29%3Dx-b%2Fx%5E2-a%E7%9A%84%E5%AE%9A%E4%B9%89%E5%9F%9F%E4%B8%BAR%2Cf%281%29%3D1%2F2+1.%E6%B1%82%E5%AE%9E%E6%95%B0a%2Cb%E7%9A%84%E5%80%BC+2%E5%B7%B2%E7%9F%A5%E5%A5%87%E5%87%BD%E6%95%B0f%28x%29%3Dx-b%2Fx%5E2-a%E7%9A%84%E5%AE%9A%E4%B9%89%E5%9F%9F%E4%B8%BAR%2Cf%281%29%3D1%2F2+1.%E6%B1%82%E5%AE%9E%E6%95%B0a%2Cb%E7%9A%84%E5%80%BC+2.%E8%8B%A5g%28x%29%3Df%28x%29-3%5E%28-x%29%E8%AF%81%E6%98%8E%E5%87%BD%E6%95%B0g%28x%29%E5%9C%A8%28-%E2%88%9E%2C%2B%E2%88%9E%EF%BC%89%E4%B8%8A%E6%9C%89%E9%9B%B6%E7%82%B9)
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