A. \(\int\limits_{}^{} {\left[ {f\left( x \right) + g\left( x \right)} \right]{\rm{d}}x} = \int\limits_{}^{} {f\left( x \right){\rm{d}}x} + \int\limits_{}^{} {g\left( x \right){\rm{d}}x} \)
B. \(\int\limits_{}^{} {kf\left( x \right){\rm{d}}x} = k\int\limits_{}^{} {f\left( x \right){\rm{d}}x} \)
C. \(\int\limits_{}^{} {f\left( x \right)g\left( x \right){\rm{d}}x} = \int\limits_{}^{} {f\left( x \right){\rm{d}}x} .\int\limits_{}^{} {g\left( x \right){\rm{d}}x} \)
D. \(\int\limits_{}^{} {f'\left( x \right){\rm{d}}x} = f\left( x \right) + C\) , \(\left( {C \in R} \right)\)
C
\(\int\limits_{}^{} {f\left( x \right)g\left( x \right){\rm{d}}x} = \int\limits_{}^{} {f\left( x \right){\rm{d}}x} .\int\limits_{}^{} {g\left( x \right){\rm{d}}x} \) là sai
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