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The elemant in the first row and third c...

The elemant in the first row and third coumn of the inverse of the matrix`[{:(1,2,-3),(0,1,2),(0,0,1):}]` is

A

-2

B

0

C

1

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
Clearly, the element in the first row and third column of the inverse of the given matrix is cofactor of the element in third row and first column of the given matrix.
Hence, required element =`{:abs((2,-3),(1,2))=7:}`
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OBJECTIVE RD SHARMA ENGLISH-MATRICES-Section I - Solved Mcqs
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  19. If U={:[(1,2,2),(-2,-1,-1),(1,-4,-3)]:}' ,sum of elements of inverse o...

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