Find, in terms of u, the inverse of the matrix
\[
A=
\begin{pmatrix}
n & n+1 \\
+1 & 7+2 \\
n+1 & n+2 \\
\end{pmatrix}
\]
Oa.
\[
A=
\begin{pmatrix}
n+2 & n-1 \\
n+1 & n \\
\end{pmatrix}
\]
Ob.
\[
A=
\begin{pmatrix}
-n-2 & n+1 \\
n+1 & -n \\
\end{pmatrix}
\]
Oc. None of the other options is correct
Od.
\[
A=
\begin{pmatrix}
-n+2 & -n-1 \\
-n-1 & -n1 \\
\end{pmatrix}
\]