प्रत्येक आव्यूह का सहखण्डज ज्ञात कीजिए-
`[(1,2),(3,4)]`

Explanation

माना `A=[(1,2),(3,4)]`
`A_(11)=(-1)^(1+1).4=4`
`A_(12)=(-1)^(1+2).3=-3`
`A_(21)=(-1)^(2+1).2=-2`
`A_(22)=(-1)^(2+2).1=1`
`:. adjA=[(A_(11),A_(12)),(A_(21),A_(22))]'`
`[(4,-3),(-2,1)]'=[(4,-2),(-3,1)]`