There are 1 questions in this calculation: for each question, the 2 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ second\ derivative\ of\ function\ -0.0036{x}^{3} + 0.0689{x}^{2} - 0.5158x + 71.162\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = -0.0036x^{3} + 0.0689x^{2} - 0.5158x + 71.162\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( -0.0036x^{3} + 0.0689x^{2} - 0.5158x + 71.162\right)}{dx}\\=&-0.0036*3x^{2} + 0.0689*2x - 0.5158 + 0\\=&-0.0108x^{2} + 0.1378x - 0.5158\\\\ &\color{blue}{The\ second\ derivative\ of\ function:} \\&\frac{d\left( -0.0108x^{2} + 0.1378x - 0.5158\right)}{dx}\\=&-0.0108*2x + 0.1378 + 0\\=&-0.0216x + 0.1378\\ \end{split}\end{equation} \]

Your problem has not been solved here? Please take a look at the  hot problems ！