The inverse of a matrix \[A=\left( \begin{matrix} a & b \\ c & d \\ \end{matrix} \right)\]is [AMU 2001]

\[\frac{1}{|A|}\left( \begin{matrix} 1 & 0 \\ 0 & 1 \\ \end{matrix} \right)\]

\[\left( \begin{matrix} d & -b \\ -c & a \\ \end{matrix} \right)\]

\[\frac{1}{(ad-bc)}\left( \begin{matrix} d & -b \\ -c & a \\ \end{matrix} \right)\]

\[\left( \begin{matrix} b & -a \\ d & -c \\ \end{matrix} \right)\]

The inverse of a matrix \[A=\left( \begin{matrix} a & b \\

1.	The inverse of a matrix \[A=\left( \begin{matrix} a & b \\ c & d \\ \end{matrix} \right)\]is [AMU 2001]
A.	\[\left( \begin{matrix} d & -b \\ -c & a \\ \end{matrix} \right)\]
B.	\[\frac{1}{(ad-bc)}\left( \begin{matrix} d & -b \\ -c & a \\ \end{matrix} \right)\]
C.	\[\frac{1}{\|A\|}\left( \begin{matrix} 1 & 0 \\ 0 & 1 \\ \end{matrix} \right)\]
D.	\[\left( \begin{matrix} b & -a \\ d & -c \\ \end{matrix} \right)\]
Answer» C. \[\frac{1}{\|A\|}\left( \begin{matrix} 1 & 0 \\ 0 & 1 \\ \end{matrix} \right)\]

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The inverse of a matrix \[A=\left( \begin{matrix} a & b \\ c & d \\ \end{matrix} \right)\]is [AMU 2001]

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