共50条信息
\((1)\)求\(a+b+c\)的值;
\((\)不等式选讲\()\)设\(a > 0\),\(b > 0\),\(c > 0\),函数\(f(x)=\left| x+a \right|+\left| x-b \right|+c\)的最小值为\(4\) .
\((\ \text{I} \ )\) 求\(a+b+c\)的值;
\(\left( \ \text{I} \text{I} \ \right)\)求\(\dfrac{1}{4}{{a}^{2}}+\dfrac{1}{9}{{b}^{2}}+{{c}^{2}}\)的最小值.
已知函数\(f(x)=a\ln x+\dfrac{1}{x}-1(a\in R)\).
\((\)Ⅰ\()\)讨论\(f(x)\)的单调性;
\((\)Ⅱ\()\)证明:\({{\ln }^{2}}{{1}^{n}}+{{\ln }^{2}}{{2}^{n}}+\cdots +{{\ln }^{2}}{{n}^{n}} > \dfrac{{{(n-1)}^{4}}}{4n}(n\geqslant 2,n\in {{N}^{*}})\).
若\(x > 0,y > 0\),且\(\dfrac{1}{2x+y}+\dfrac{1}{x+y}=2\),则\(4x+3y\)的最小值________.
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