Đề bài

Cho $\int\limits_{ - 2}^1 {f\left( x \right)dx}  = 5$ và $\int\limits_{ - 2}^1 {g\left( x \right)dx}  =  - 4$. Tính:

a) $\int\limits_1^{ - 2} {f\left( x \right)dx}$;

b) $\int\limits_{ - 2}^1 { - 4f\left( x \right)dx}$;

c) $\int\limits_{ - 2}^1 {\frac{{ - 2g\left( x \right)}}{3}dx}$;

d) $\int\limits_{ - 2}^1 {\left[ {f\left( x \right) + g\left( x \right)} \right]dx}$;

e) $\int\limits_{ - 2}^1 {\left[ {f\left( x \right) - g\left( x \right)} \right]dx}$;

g) $\int\limits_{ - 2}^1 {\left[ {3f\left( x \right) - 5g\left( x \right)} \right]dx}$.