![\left[\begin{array}{ccc}a&b\\c&d\end{array}\right]](/tpl/images/0333/9292/0e273.png)
![\left[\begin{array}{ccc}\frac{d}{ad-bc} &\frac{-b}{ad-bc}\\\frac{-c}{ad-bc} &\frac{a}{ad-bc}\end{array}\right]](/tpl/images/0333/9292/0525f.png)
![\frac{1}{61}\left[\begin{array}{ccc}9&2\\10&9\end{array}\right]](/tpl/images/0333/9292/dca0c.png)
=![\left[\begin{array}{ccc}\frac{9}{61}&\frac{2}{61}\\\frac{10}{61} &\frac{9}{61}\end{array}\right]](/tpl/images/0333/9292/e6a89.png)
Find the inverse of the matrix , if it exist.
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Answers: 3
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