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[{:(1,3),(2,7):}] find the inverse of ma...

`[{:(1,3),(2,7):}]` find the inverse of matrix

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The correct Answer is:
N/a
`LetA=[{:(1,3),(2,7):}]`
Now, A=IA
`implies [{:(1,3),(2,7):}]=[{:(1,0),(0,1):}]A`
`implies [{:(1,3),(0,1):}]=[{:(1,0),(-2,1)AR_(2)to R_(2)-2R_(1)`
`implies [{:(1,0),(0,1)=[{:(7,-3),(-2,1)AR_(1)to R_(1) -3R_(1)`
`therefore A^(-1)=[{:(7,-3),(-2,1):}]`
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