APFIVE Inverse Of A 2x2 Matrix
Given matrix $$A = \begin{bmatrix} 3 & -2 \\ 4 & 1 \end{bmatrix}$$, what is the inverse of matrix $$A$$?
A
$$\begin{bmatrix} \frac{1}{3} & 2 \\ -4 & 1 \end{bmatrix}$$
B
$$\frac{1}{11}\begin{bmatrix} 1 & -2 \\ 4 & 3 \end{bmatrix}$$
C
$$\frac{1}{11}\begin{bmatrix} 1 & 2 \\ -4 & 3 \end{bmatrix}$$
D
$$\frac{1}{5}\begin{bmatrix} 1 & 2 \\ -4 & 3 \end{bmatrix}$$
Question Leaderboard
Not enough data yet to show leaderboard.