Question

Cho $\int_0^3 f(x) d x=5$ và $\int_0^3 g(x) d x=2$. Tính:
a) $\int_0^3[f(x)+g(x)] d x$;
b) $\int_0^3[f(x)-g(x)] d x$;
c) $\int_0^3 3 f(x) d x$
d) $\int_0^3[2 f(x)-3 g(x)] d x$.