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Use the Inverse Formula A1=1adbc[dbca]A ^ { - 1 } = \frac { 1 } { a d - b c } \left[ \begin{array} { c c } d & - b \\- c & a\end{array} \right]

question 63

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Use the inverse formula A1=1adbc[dbca]A ^ { - 1 } = \frac { 1 } { a d - b c } \left[ \begin{array} { c c } d & - b \\- c & a\end{array} \right] to find the inverse of the 2×2 matrix (if it exists) .
[2315]\left[ \begin{array} { l l } 2 & 3 \\1 & 5\end{array} \right]


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