The inverse of the matrix \(\begin{pmatrix} 2 & 1 \\ 1 & 1 \end{pmatrix}\) is
a
\(\begin{pmatrix} 1 & -1 \\ -1 & 2 \end{pmatrix}\)
b
\(\begin{pmatrix} 1 & -1 \\ 1 & 2 \end{pmatrix}\)
c
\(\begin{pmatrix} 1 & 1 \\ 1 & 2 \end{pmatrix}\)
d
\(\begin{pmatrix} -1 & 1 \\ 1 & 2 \end{pmatrix}\)
Explanation
Correct Option
aVideo Explanation
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