共50条信息
已知\(f(x)\)是定义在\(R\)上的周期为\(2\)的函数,当\(x∈(-1,1]\)时,\(f(x)=\begin{cases} -4x^{2}+ \dfrac{9}{8},-1 < x\leqslant 0, \\ \log _{2}x,0 < x\leqslant 1, \end{cases}\),则\(f(f( \dfrac{7}{2}))=\)________.
设\(f_{0}(x)=\sin x\),\(f_{1}(x)=f_{0}′(x)\),\(f_{2}(x)=f_{1}′(x)\),\(…\),\(f_{n+1}(x)=f_{n}′(x)\),\(n∈N\),则\(f_{2015}(x)\)等于\((\) \()\)
下列函数中,是周期函数且最小正周期为\(π\)的是( )
已知函数\(f(x)\)是定义在\(R\)上且周期为\(4\)的偶函数,当\(x∈[2,4]\)时,\(f\left(x\right)=\left|{\log }_{4}\left(x- \dfrac{3}{2}\right)\right| \),则\(f\left( \dfrac{1}{2}\right) \)的值为_____.
已知\(y=f(x)\)是定义在\(R\)上的函数,且满足\(①f(4)=0\);\(②\)曲线\(y=f(x+1)\)关于点\((-1,0)\)对称;\(③\)当\(x\in (-4,0)\)时\(f(x)={{\log }_{2}}(\dfrac{x}{{{e}^{|x|}}}+{{e}^{x}}-m+1)\),若\(y=f(x)\)在\(x\in [-4,4]\)上有\(5\)个零点,则实数\(m\)的取值范围为\((\) \()\)
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