There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ \frac{36}{(\frac{9}{10}(1 + x))}\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( \frac{36}{(\frac{9}{10} + \frac{9}{10}x)}\right)}{dx}\\=&36(\frac{-(0 + \frac{9}{10})}{(\frac{9}{10} + \frac{9}{10}x)^{2}})\\=&\frac{-162}{5(\frac{9}{10}x + \frac{9}{10})^{2}}\\ \end{split}\end{equation} \]

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