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Find minors and cofactors of the elements `a_(11),a_(21)` in the determinant `Delta=|{:(a_(11),a_(12),a_(13)),(a_(21),a_(22),a_(23)),(a_(31),a_(32),a_(33)):}|`

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The correct Answer is:
Minor : `a_(11)=M_(11)=a_(22)a_(33)-a_(23)-a_(23)a_(32)`
`a_(21)=M_(21)=a_(12)a_(33)-a_(13)a_(32)`
Cofactor : `a_(11)=a_(22)a_(33)-a_(23)a_(32)`
`a_(21)=-a_(12)a_(33)+a_(13)a_(32)`
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KUMAR PRAKASHAN-DETERMINANTS -Textbook Illustrations for Practice work
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  7. Find minors and cofactors of the elements a(11),a(21) in the determina...

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  8. Find minors and cofactors of the elements of the determinant |{:(2,-3,...

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  9. Find adj A for A = {:[( 2,3),( 1,4) ]:}

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  10. If A=[{:(1,3,3),(1,4,3),(1,3,4):}] , then verify that A adjA=|A|I. Als...

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  11. If A=[{:(2,3),(1,-4):}] and B=[{:(1,-2),(-1,3):}] then verify that (AB...

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  12. Show that the matrix A=[{:(2,3),(1,2):}] satisfies the equation A^2-4A...

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  15. The sum of three numbrs is 6. If we multiply third number by 3 and add...

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  16. If a,b,c are positive and unequal, show that value of the determinant ...

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  19. Solve following system using matrix x-y+2z =1 , 2y -3z =1, 3x...

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