There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ ((x*0.9) - 150)(1 - 0.05 + 0.018)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = 0.9x - 0.045x + 0.0162x - 145.2\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( 0.9x - 0.045x + 0.0162x - 145.2\right)}{dx}\\=&0.9 - 0.045 + 0.0162 + 0\\=&0.8712\\ \end{split}\end{equation} \]

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