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 .
函数\(f\left( x \right)=\begin{cases} x+1, \\ -x+3, \end{cases}\) \(\begin{matrix} x\leqslant 1, \\ x > 1, \\\end{matrix}\) 则\(f\left( f\left( 4 \right) \right)=\)_______.
若函数\(f(x){=}\begin{cases} x{+}2{,}x{ > }0 \\ x^{2}{-}1{,}x{\leqslant }0 \end{cases}\),则\(f(f({-}2)){=}\)______ .
已知函数\(f(x)=\begin{cases} & {{x}^{\frac{1}{2}}},x\geqslant 4 \\ & {{2}^{x}},x < 4 \end{cases}\),则\(f[f(2)]=\)( )
已知\(f(x){=}\begin{cases} x{-}5{,}x{\geqslant }6 \\ f(x{+}2){,}x{ < }6 \end{cases}\),则\(f(5)=\) ( )
函数\(f(x)=\begin{cases} & 2x-{{x}^{2}},(0 < x\leqslant 3) \\ & {{x}^{2}}+6x,(-2\leqslant x\leqslant 0) \end{cases}\)的值域为\((\) \()\)
设函数\(f(x){=}\begin{cases} \overset{2^{1{-}x}{,}x{\leqslant }1}{1{-}\log_{2}x{,}x{ > }1} \end{cases}\),则\(f(f(4)){=}(\) \()\)
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