There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ \frac{(-3.99x + 7.41)}{(-1.42 + 4.15)}\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = -1.4615384615385x + 2.71428571428571\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( -1.4615384615385x + 2.71428571428571\right)}{dx}\\=&-1.4615384615385 + 0\\=&-1.4615384615385\\ \end{split}\end{equation} \]

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