A. \(\int\limits_a^b {kf\left( x \right){\rm{d}}x} = k\int\limits_a^b {f\left( x \right){\rm{d}}x} \)
B. \(\int\limits_a^b {f\left( x \right)g\left( x \right){\rm{d}}x} = \int\limits_a^b {f\left( x \right){\rm{d}}x} .\int\limits_a^b {g\left( x \right){\rm{d}}x} \)
C. \(\int\limits_a^b {\left[ {f\left( x \right) + g\left( x \right)} \right]{\rm{d}}x} = \int\limits_a^b {f\left( x \right){\rm{d}}x} + \int\limits_a^b {g\left( x \right){\rm{d}}x} \)
D. \(\int\limits_a^b {\left[ {f\left( x \right) - g\left( x \right)} \right]{\rm{d}}x} = \int\limits_a^b {f\left( x \right){\rm{d}}x} - \int\limits_a^b {g\left( x \right){\rm{d}}x} \)
B
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