There are 1 questions in this calculation: for each question, the 2 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ second\ derivative\ of\ function\ y{x}^{6}x\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = yx^{7}\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( yx^{7}\right)}{dx}\\=&y*7x^{6}\\=&7yx^{6}\\\\ &\color{blue}{The\ second\ derivative\ of\ function:} \\&\frac{d\left( 7yx^{6}\right)}{dx}\\=&7y*6x^{5}\\=&42yx^{5}\\ \end{split}\end{equation} \]

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