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Question

The inverse of 357231112 is

A
73263111520
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B
73263111521
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C
31117326521
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D
None of these
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Solution

The correct option is D None of these
Let A = 357231112, |A|=3(-7)-5(3)+7(5)=-1
Adj(A)=732631115519A1=Adj(A)|A|A1 is 732631115519

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