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Linear Algebra

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Find 3x3 Inverse - 3

LINALG-TGB9X1

Find the inverse of the matrix:

$$\begin{pmatrix}1&1&3\\\ 4&1&6\\\ 7&1&9\end{pmatrix}$$

...if it exists.

A

$\begin{pmatrix}1&2&1\\\ 26&4&-6\\\ 4&2&-2\end{pmatrix}$

B

$\begin{pmatrix}1&2&1\\\ 24&4&-6\\\ 4&2&-2\end{pmatrix}$

C

$\begin{pmatrix}5&-2&3\\\ -2&-4&2\\\ -4&2&-\cfrac{5}{2}\end{pmatrix}$

D

$\begin{pmatrix}5&-2&-3\\\ -2&-4&-2\\\ -4&2&\cfrac{5}{2}\end{pmatrix}$

E

This matrix is not invertible