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Last edited by dvkxgl 2019-11-18 18:44设函数$f(x)=x-\frac{\lambda }{{{x}^{2}}}-\mu \ln \frac{{{x}^{3}}}{\lambda }(0<\lambda <{{\mu }^{3}})$有三个零点$x_1,x_2,x_3$,且$0<x_1<x_2<x_3$,证明: ${{x}_{1}}+\frac{\lambda }{x_{1}^{2}}>2\mu ,\quad {{x}_{3}}+\frac{\lambda }{x_{3}^{2}}>2\mu $. |
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