Tính tích phân $\Large I=\int\limits_{0}^{3}{\dfrac{dx}{x+2}}$. $\Larg

Tính tích phân $\Large I=\int\limits_{0}^{3}{\dfrac{dx}{x+2}}$.

• A.

  $\Large I=\dfrac{4581}{5000}$

• B.

  $\Large I=\log \dfrac{5}{2}$

• C.

  $\Large I=\ln \dfrac{5}{2}$

• D.

  $\Large I=-\dfrac{21}{100}$

Chọn C

Ta có: $\Large I=\int\limits_{0}^{3}{\dfrac{dx}{x+2}}$ $\Large =\ln \left| x+2 \right|\left| \begin{align}  & 3 \\ & 0 \\ \end{align} \right.=\ln \dfrac{5}{2}$