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[不等式] 指对混合不等式

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v6mm131 Posted 2017-7-22 20:26 |Read mode

\[e^x-\ln (x+1)-2x>0\]

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Author| v6mm131 Posted 2017-7-23 01:20

\[e^x-\frac{5}{2}x\ge \frac{5}{2}-\frac{5}{2}\ln \frac{5}{2}>\ln 2-\frac{1}{2}\ge \ln (x+1)-\frac{1}{2}x\]

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