Tìm khẳng định sai.
A.\(\int {\left[ {f\left( x \right) + g\left( x \right)} \right]dx = \int {f\left( x \right)dx} + \int {g\left( x \right)dx} } \)
B.\(\int_a^b {f\left( x \right)dx = \int_a^c {f\left( x \right)dx + } } \int_c^b {f\left( x \right)dx,\,\,\,\,a < c < b} \)
C.\( \int\limits {f\left( x \right)g\left( x \right)dx} = \int\limits{f\left( x \right)dx.\int\limits {g\left( x \right)dx} } \)
D.\(\int\limits_{}^{} {f'\left( x \right)dx} = f\left( x \right) + C\)