急,谢谢了,.f(x)的定义域是(0,+∞),f'(x)是f(x)的导函数,期待xf'(x)-f(x)>0在(0,+∞)内恒成立. (1)急,谢谢了,.f(x)的定义域是(0,+∞),f'(x)是f(x)的导函数,期待xf'(x)-f(x)>0在(0,+∞)内恒成立.(1)求F(x)=f(x)/x的
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![急,谢谢了,.f(x)的定义域是(0,+∞),f'(x)是f(x)的导函数,期待xf'(x)-f(x)>0在(0,+∞)内恒成立. (1)急,谢谢了,.f(x)的定义域是(0,+∞),f'(x)是f(x)的导函数,期待xf'(x)-f(x)>0在(0,+∞)内恒成立.(1)求F(x)=f(x)/x的](/uploads/image/z/1996040-56-0.jpg?t=%E6%80%A5%2C%E8%B0%A2%E8%B0%A2%E4%BA%86%2C.f%28x%29%E7%9A%84%E5%AE%9A%E4%B9%89%E5%9F%9F%E6%98%AF%280%2C%2B%E2%88%9E%29%2Cf%27%28x%29%E6%98%AFf%28x%29%E7%9A%84%E5%AF%BC%E5%87%BD%E6%95%B0%2C%E6%9C%9F%E5%BE%85xf%27%28x%29-f%28x%29%EF%BC%9E0%E5%9C%A8%280%2C%2B%E2%88%9E%29%E5%86%85%E6%81%92%E6%88%90%E7%AB%8B.+%281%29%E6%80%A5%2C%E8%B0%A2%E8%B0%A2%E4%BA%86%2C.f%28x%29%E7%9A%84%E5%AE%9A%E4%B9%89%E5%9F%9F%E6%98%AF%280%2C%2B%E2%88%9E%29%2Cf%27%28x%29%E6%98%AFf%28x%29%E7%9A%84%E5%AF%BC%E5%87%BD%E6%95%B0%2C%E6%9C%9F%E5%BE%85xf%27%28x%29-f%28x%29%EF%BC%9E0%E5%9C%A8%280%2C%2B%E2%88%9E%29%E5%86%85%E6%81%92%E6%88%90%E7%AB%8B.%281%29%E6%B1%82F%28x%29%3Df%28x%29%2Fx%E7%9A%84)
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