There are 1 questions in this calculation: for each question, the 1 derivative of S is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ \frac{(V(S + dS) - V(S - dS))}{(2dS)}\ with\ respect\ to\ S：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = \frac{\frac{1}{0}V}{d} + \frac{1}{4}V\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( \frac{\frac{1}{0}V}{d} + \frac{1}{4}V\right)}{dS}\\=&0 + 0\\=&0\\ \end{split}\end{equation} \]

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