共50条信息
\(12.\) 函数\(f(x)=\begin{cases} \left| x \right|-2, & x\leqslant 0, \\ 2x-6+\ln x, & x > 0 \end{cases}\)的零点个数是 ．
已知函数\(f(x)=\begin{cases} & x+\dfrac{1}{x-2},x > 2 \\ & {{x}^{2}}+2,x\leqslant 2 \end{cases}\)则\(f[f(1)]=\)( )
已知函数\(f(x){=}\begin{cases} x^{2}{+}4x{+}3{,}x{\leqslant }0 \\ 3{-}x{,}x{ > }0 \end{cases}\)则\(f(f(5)){=}({ })\)
函数\(y= \dfrac{x\ln |x|}{|x|}\)的图象可能是\((\) \()\)
已知函数\(f\left(x\right)=\begin{cases}{\log }_{2}\left(x+3\right),x\geqslant 0 \\ {x}^{2},x < 0\end{cases} \)则\(f(f(-1))=\)______．
函数\(y=2\sin \left(x+ \dfrac{π}{3}\right)\left(x∈\left[0, \dfrac{π}{2}\right]\right) \)的值域是 ．
已知函数\(f(x)=3^{x}-( \dfrac{1}{3}{)}^{x} \)，则\(f\)\((\)\(x\)\()\)( )
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