If $A=\begin{bmatrix}5 & 3 \\1 & 1 \end{bmatrix}$, then $A^{-1}$=

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If $A=\begin{bmatrix}5 & 3 \\1 & 1 \end{bmatrix}$, then $A^{-1}$=

E

Editor

Sep 18, 2022

If $A=\begin{bmatrix}5 & 3 \\1 & 1 \end{bmatrix}$, then $A^{-1}$=

Difficulty: Hard

A:

\frac{1}{8}\begin{bmatrix}1 & -3 \\-1 & 5 \end{bmatrix}

B:

\frac{1}{8}\begin{bmatrix}-5 & 1 \\3 & -1 \end{bmatrix}

C:

\begin{bmatrix}\frac{1}{2} & -\frac{3}{2} \\-\frac{1}{2} & \frac{5}{2} \end{bmatrix}

D:

\frac{1}{2}\begin{bmatrix}5 & -3 \\-2 & 1 \end{bmatrix}

ID: 63273dbaca83163ac3a11d03