共50条信息
函数\(f\left(x\right)= \dfrac{\sin x}{{x}^{2}+1} \)的图象大致为\((\) \()\)
已知函数\(f(x)=(x-1)(ax+b)\)为偶函数,且在\((0,+\infty )\)单调递减,则\(f(2-x) < 0\)的解集为\((\) \()\)
函数\(f_{1}(x)=\dfrac{1}{x}\),\(f_{2}(x)=\dfrac{1}{x+{{f}_{1}}(x)}\),\(…\),\(f_{n+1}(x)=\dfrac{1}{x+{{f}_{n}}(x)}\),\(…\),则函数\(f_{2018}(x)\)是\((\) \()\)
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