Nếu $\displaystyle\displaystyle\int_{-1}^4f(x)\mathrm{\,d}x=2$ và $\displaystyle\displaystyle\int_{-1}^4g(x)\mathrm{\,d}x=3$ thì $\displaystyle\displaystyle\int_{-1}^4\big[f(x)+g(x)\big]\mathrm{\,d}x$ bằng
![]() | $5$ |
![]() | $6$ |
![]() | $1$ |
![]() | $-1$ |
Chọn phương án A.
$\displaystyle\int_{-1}^4\big[f(x)+g(x)\big]\mathrm{\,d}x=\int_{-1}^4f(x)\mathrm{\,d}x+\int_{-1}^4g(x)\mathrm{\,d}x=2+3=5$.