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

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