There are 1 questions in this calculation: for each question, the 1 derivative of R is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ 13689R{\frac{1}{(37 + R)}}^{2}\ with\ respect\ to\ R：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = \frac{13689R}{(R + 37)^{2}}\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( \frac{13689R}{(R + 37)^{2}}\right)}{dR}\\=&13689(\frac{-2(1 + 0)}{(R + 37)^{3}})R + \frac{13689}{(R + 37)^{2}}\\=&\frac{-27378R}{(R + 37)^{3}} + \frac{13689}{(R + 37)^{2}}\\ \end{split}\end{equation} \]

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