प्रश्न 3 और 4 में सत्यापित कीजिये की A(a...

प्रश्न 3 और 4 में सत्यापित कीजिये की A(adi A) =(adjA).`A=|A|.I` है ।
`[{:(1,,-1,,2),(3,,0,,-2),(1,,0,,3):}]`

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