共50条信息
若\(a=\sqrt{3}-\sqrt{2},b=\sqrt{6}-\sqrt{5},c=\sqrt{7}-\sqrt{6}\),则\(a\)、\(b\)、\(c\)的大小顺序是_________.
已知\(b > a > 0,\)且\(a+b=1\),那么( )
已知\(0 < a < \)\( \dfrac{1}{2}\),\(A=1-a\)\({\,\!}^{2}\),\(B=1+a\)\({\,\!}^{2}\),\(C=\)\( \dfrac{1}{1-a}\),\(D=\)\( \dfrac{1}{1+a}\),试比较\(A\),\(B\),\(C\),\(D\)的大小.
已知定义域为\(R\)的奇函数\(y=f\left( x \right)\)的导函数为\(y={f}{{{"}}}\left( x \right)\),当\(x\ne 0\)时,\({f}{{{"}}}(x)+\dfrac{f(x)}{x} > 0\),若\(a=\dfrac{1}{2}f\left( \dfrac{1}{2} \right)\),\(b=-2f\left( -2 \right)\),\(c=\left( {\ln }\dfrac{1}{2} \right)f\left( {\ln }\dfrac{1}{2} \right)\),则\(a\),\(b\),\(c\)的大小关系正确的是\((\) \()\)
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