Đáp án: A - A - A
Giải thích các bước giải:
$\begin{array}{l}
16)\\
\int\limits_{ - 2}^2 {2g\left( x \right)dx} = 8\\
\int\limits_2^5 {g\left( x \right)dx = 3} \\
\Leftrightarrow \int\limits_{ - 2}^2 {g\left( x \right)dx} = 4;\int\limits_2^5 {g\left( x \right)dx = 3} \\
\Leftrightarrow \int\limits_{ - 2}^2 {g\left( x \right)dx} + \int\limits_2^5 {g\left( x \right)dx} = \int\limits_{ - 2}^5 {g\left( x \right)dx} = 7\\
\Leftrightarrow A\\
17)\\
\int\limits_1^3 {{x^2}dx} = \left( {\dfrac{1}{3}{x^3}} \right)\left| {_1^3} \right. = \dfrac{1}{3}.\left( {{3^3} - 1} \right) = \dfrac{1}{3}.26 = \dfrac{{26}}{3}\\
\Leftrightarrow A\\
18)\\
z = 4 - 5i\\
\Leftrightarrow \overline z = 4 + 5i\\
\Leftrightarrow A
\end{array}$
