共50条信息
已知函数\(f(x)=\dfrac{1}{x}+a\ln x(a\)为参数\()\).
\((1)\)若\(a=1\),求函数\(f(x)\)单调区间;
\((2)\)求证:\({\left(1+ \dfrac{1}{n}\right)}^{n} < e < {\left(1+ \dfrac{1}{n}\right)}^{n+1}\left(e=2.718……,n∈{N}^{*}\right) \)
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