There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ b + sqrt(x + a) + \frac{x*2(x + a)}{2}\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = b + sqrt(x + a) + x^{2} + ax\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( b + sqrt(x + a) + x^{2} + ax\right)}{dx}\\=&0 + \frac{(1 + 0)*\frac{1}{2}}{(x + a)^{\frac{1}{2}}} + 2x + a\\=&\frac{1}{2(x + a)^{\frac{1}{2}}} + 2x + a\\ \end{split}\end{equation} \]

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