There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ sqrt(x + 9) + sqrt(x + 16)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( sqrt(x + 9) + sqrt(x + 16)\right)}{dx}\\=&\frac{(1 + 0)*\frac{1}{2}}{(x + 9)^{\frac{1}{2}}} + \frac{(1 + 0)*\frac{1}{2}}{(x + 16)^{\frac{1}{2}}}\\=&\frac{1}{2(x + 9)^{\frac{1}{2}}} + \frac{1}{2(x + 16)^{\frac{1}{2}}}\\ \end{split}\end{equation} \]

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