There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ \frac{a{x}^{2}}{(x + b)}\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = \frac{ax^{2}}{(x + b)}\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( \frac{ax^{2}}{(x + b)}\right)}{dx}\\=&(\frac{-(1 + 0)}{(x + b)^{2}})ax^{2} + \frac{a*2x}{(x + b)}\\=&\frac{-ax^{2}}{(x + b)^{2}} + \frac{2ax}{(x + b)}\\ \end{split}\end{equation} \]

Your problem has not been solved here? Please take a look at the  hot problems ！