There are 1 questions in this calculation: for each question, the 1 derivative of a is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ a{x}^{7} + b{x}^{6} + d{x}^{5} + f{x}^{4} + h{x}^{3} + g{x}^{2} + ix + c\ with\ respect\ to\ a：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = x^{7}a + x^{6}b + x^{5}d + x^{4}f + x^{3}h + x^{2}g + xi + c\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( x^{7}a + x^{6}b + x^{5}d + x^{4}f + x^{3}h + x^{2}g + xi + c\right)}{da}\\=&x^{7} + 0 + 0 + 0 + 0 + 0 + 0 + 0\\=&x^{7}\\ \end{split}\end{equation} \]

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