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

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