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

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