There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ {x}^{(\frac{4}{5})}(x - 9)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = x^{\frac{9}{5}} - 9x^{\frac{4}{5}}\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( x^{\frac{9}{5}} - 9x^{\frac{4}{5}}\right)}{dx}\\=&\frac{9}{5}x^{\frac{4}{5}} - \frac{9*\frac{4}{5}}{x^{\frac{1}{5}}}\\=&\frac{9x^{\frac{4}{5}}}{5} - \frac{36}{5x^{\frac{1}{5}}}\\ \end{split}\end{equation} \]

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