Cho hàm số\[y = f\left( x \right),y = g\left( x \right)\]liên tục trên \[\left[ {a;b} \right]\]. Các mệnh đề sau đây đúng hay sai?

  A.\[\int\limits_a^b {\left[ {f\left( x \right) + g\left( x \right)} \right]{\rm{d}}x}  = \int\limits_a^b {f\left( x \right)} {\rm{d}}x + \int\limits_a^b {g\left( x \right){\rm{d}}x} \].

Lý thuyết

\[\int\limits_a^b {\left[ {f\left( x \right) + g\left( x \right)} \right]{\rm{d}}x}  = \int\limits_a^b {f\left( x \right)} {\rm{d}}x + \int\limits_a^b {g\left( x \right){\rm{d}}x} \]\[\int\limits_a^b {kf\left( x \right){\rm{d}}x = k\int\limits_a^b {f\left( x \right){\rm{d}}x} } \]

Lý thuyết

\[\int\limits_a^b {\left[ {f\left( x \right) + g\left( x \right)} \right]{\rm{d}}x}  = \int\limits_a^b {f\left( x \right)} {\rm{d}}x + \int\limits_a^b {g\left( x \right){\rm{d}}x} \]\[\int\limits_a^b {kf\left( x \right){\rm{d}}x = k\int\limits_a^b {f\left( x \right){\rm{d}}x} } \]

D- Sai 

Lý thuyết

\[\int\limits_a^b {\left[ {f\left( x \right) + g\left( x \right)} \right]{\rm{d}}x}  = \int\limits_a^b {f\left( x \right)} {\rm{d}}x + \int\limits_a^b {g\left( x \right){\rm{d}}x} \]\[\int\limits_a^b {kf\left( x \right){\rm{d}}x = k\int\limits_a^b {f\left( x \right){\rm{d}}x} } \]