There are 1 questions in this calculation: for each question, the 2 derivative of k is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ second\ derivative\ of\ function\ {k}^{2} - 8k + 1\ with\ respect\ to\ k：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = k^{2} - 8k + 1\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( k^{2} - 8k + 1\right)}{dk}\\=&2k - 8 + 0\\=&2k - 8\\\\ &\color{blue}{The\ second\ derivative\ of\ function:} \\&\frac{d\left( 2k - 8\right)}{dk}\\=&2 + 0\\=&2\\ \end{split}\end{equation} \]

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