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

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