There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ x(6.0215 - 0.0695{e}^{(0.4x)})\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = - 0.0695x{e}^{(0.4x)} + 6.0215x\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( - 0.0695x{e}^{(0.4x)} + 6.0215x\right)}{dx}\\=& - 0.0695{e}^{(0.4x)} - 0.0695x({e}^{(0.4x)}((0.4)ln(e) + \frac{(0.4x)(0)}{(e)})) + 6.0215\\=& - 0.0695{e}^{(0.4x)} - 0.0278x{e}^{(0.4x)} + 6.0215\\ \end{split}\end{equation} \]

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