本次共计算 1 个题目:每一题对 x 求 2 阶导数。
注意,变量是区分大小写的。\[ \begin{equation}\begin{split}【1/1】求函数ln(\frac{(x + 2)}{(1 - x)}) 关于 x 的 2 阶导数:\\\end{split}\end{equation} \]
\[ \begin{equation}\begin{split}\\解:&\\ &原函数 = ln(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})\\&\color{blue}{函数的第 1 阶导数:}\\&\frac{d\left( ln(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})\right)}{dx}\\=&\frac{((\frac{-(-1 + 0)}{(-x + 1)^{2}})x + \frac{1}{(-x + 1)} + 2(\frac{-(-1 + 0)}{(-x + 1)^{2}}))}{(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})}\\=&\frac{x}{(-x + 1)^{2}(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})} + \frac{2}{(-x + 1)^{2}(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})} + \frac{1}{(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})(-x + 1)}\\\\ &\color{blue}{函数的第 2 阶导数:} \\&\frac{d\left( \frac{x}{(-x + 1)^{2}(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})} + \frac{2}{(-x + 1)^{2}(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})} + \frac{1}{(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})(-x + 1)}\right)}{dx}\\=&\frac{(\frac{-2(-1 + 0)}{(-x + 1)^{3}})x}{(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})} + \frac{(\frac{-((\frac{-(-1 + 0)}{(-x + 1)^{2}})x + \frac{1}{(-x + 1)} + 2(\frac{-(-1 + 0)}{(-x + 1)^{2}}))}{(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})^{2}})x}{(-x + 1)^{2}} + \frac{1}{(-x + 1)^{2}(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})} + \frac{2(\frac{-2(-1 + 0)}{(-x + 1)^{3}})}{(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})} + \frac{2(\frac{-((\frac{-(-1 + 0)}{(-x + 1)^{2}})x + \frac{1}{(-x + 1)} + 2(\frac{-(-1 + 0)}{(-x + 1)^{2}}))}{(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})^{2}})}{(-x + 1)^{2}} + \frac{(\frac{-((\frac{-(-1 + 0)}{(-x + 1)^{2}})x + \frac{1}{(-x + 1)} + 2(\frac{-(-1 + 0)}{(-x + 1)^{2}}))}{(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})^{2}})}{(-x + 1)} + \frac{(\frac{-(-1 + 0)}{(-x + 1)^{2}})}{(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})}\\=&\frac{2x}{(-x + 1)^{3}(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})} - \frac{x^{2}}{(-x + 1)^{4}(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})^{2}} - \frac{x}{(-x + 1)^{3}(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})^{2}} - \frac{4x}{(-x + 1)^{4}(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})^{2}} - \frac{x}{(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})^{2}(-x + 1)^{3}} + \frac{2}{(-x + 1)^{2}(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})} - \frac{4}{(-x + 1)^{4}(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})^{2}} + \frac{4}{(-x + 1)^{3}(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})} - \frac{2}{(-x + 1)^{3}(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})^{2}} - \frac{2}{(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})^{2}(-x + 1)^{3}} - \frac{1}{(\frac{x}{(-x + 1)} + \frac{2}{(-x + 1)})^{2}(-x + 1)^{2}}\\ \end{split}\end{equation} \]你的问题在这里没有得到解决?请到 热门难题 里面看看吧!