Câu 11:
Nếu ∫25f(x)dx=3\displaystyle\int_2^5 f(x) \mathrm{d} x=3∫25f(x)dx=3 và ∫25g(x)dx=−2\displaystyle\int_2^5 g(x) \mathrm{d} x=-2∫25g(x)dx=−2 thì ∫25[f(x)+g(x)] dx\displaystyle\int_2^5\left[f(x)+g(x) \right]\mathrm{\,d}x∫25[f(x)+g(x)]dx bằng
