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Question

The inverse of the matrix [2113]

A
15[2113]
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B
15[3112]
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C
15[3112]
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D
15[3112]
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Solution

The correct option is A 15[3112]
formula to find the inverse of the matrix =A=(abcd)
hence A1=1adbc(dbca)
in this A=(2113)
A1=12×31×1(3112)

A1=15(3112).

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