对于使f(x)≥M成立的所有常数M中,我们把M的最大值称为函数的下确界,若lg a+lg b=0则b/(1+a^2)+a/(1+b^2)的下确界为多少?
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![对于使f(x)≥M成立的所有常数M中,我们把M的最大值称为函数的下确界,若lg a+lg b=0则b/(1+a^2)+a/(1+b^2)的下确界为多少?](/uploads/image/z/6850895-23-5.jpg?t=%E5%AF%B9%E4%BA%8E%E4%BD%BFf%28x%29%E2%89%A5M%E6%88%90%E7%AB%8B%E7%9A%84%E6%89%80%E6%9C%89%E5%B8%B8%E6%95%B0M%E4%B8%AD%2C%E6%88%91%E4%BB%AC%E6%8A%8AM%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC%E7%A7%B0%E4%B8%BA%E5%87%BD%E6%95%B0%E7%9A%84%E4%B8%8B%E7%A1%AE%E7%95%8C%2C%E8%8B%A5lg+a%2Blg+b%3D0%E5%88%99b%2F%281%2Ba%5E2%29%2Ba%2F%281%2Bb%5E2%29%E7%9A%84%E4%B8%8B%E7%A1%AE%E7%95%8C%E4%B8%BA%E5%A4%9A%E5%B0%91%3F)
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