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

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