2023 Tianjin Question 4 Single-choice Differentiating 2023_天津 Paper 4. 函数 $f(x)$ 的图象如下图所示,则 $f(x)$ 的解析式可能为() A. $\frac{5\left(\mathrm{e}^x - \mathrm{e}^{-x}\right)}{x^2 + 2}$B. $\frac{5\sin x}{x^2 + 1}$C. $\frac{5\left(\mathrm{e}^x + \mathrm{e}^{-x}\right)}{x^2 + 2}$D. $\frac{5\cos x}{x^2 + 1}$ Answer keyD ☆ SaveCan't do it, show the explanation查看原卷 →