1.

If \[\int{g(x)dx=g(x),}\] then\[\int{g(x)\{f(x)+f'(x)\}dx}\] is equal to

A. \[g(x)f(x)-g(x)f'(x)+C\]
B. \[g(x)f'(x)+C\]
C. \[g(x)f(x)+C\]
D. \[g(x){{f}^{2}}(x)+C\]
Answer» D. \[g(x){{f}^{2}}(x)+C\]


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