E
Editor
Sep 18, 2022
The adjoint of the matrix $A=\begin{bmatrix}a & b \\c & d \end{bmatrix}$ is
Difficulty: Easy
A:
$\begin{bmatrix}-a & c \\b & -d \end{bmatrix}$
B:
$\begin{bmatrix}a & -c \\-b & d \end{bmatrix}$
C:
$\begin{bmatrix}1/a & -b \\-c & 1/d \end{bmatrix}$
D:
$\begin{bmatrix}-d & c \\b & -a\end{bmatrix}$
ID: 63273dbaca83163ac3a11ceb