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Delta=|(a(11),a(12),a(13)),(a(21),a(22),...

`Delta=|(a_(11),a_(12),a_(13)),(a_(21),a_(22),a_(23)),(a_(31),a_(32),a_(33))| and A_(ij)` is cofactor of `a_(ij)` then value of `Delta` is given by

A

`a_(11) A_(31) +a_(12)A_(32) + a_(13) A_(33)`

B

`a_(11) A_(11) + a_(12) A_(21) + a_(13) A_(31)`

C

`a_(21) A_(11) + a_(22) A_(12) + a_(23) A_(13)`

D

`a_(11) A_(11) + a_(21) A_(21) + a_(31) A_(31)`

Text Solution

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The correct Answer is:
D
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OMEGA PUBLICATION-DETERMINANTS-Multiple Choice Questions (MCQs)
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  11. If |[x,2],[18,x]| = |[6,2],[18,6]|, then x is equal to:

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  12. Let A be a square matrix of order 3 xx 3. Then I kA I is equal to :

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  13. If A is an invertible matrix of order n, then |adj A|=

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  14. If area of triangle is 35 sq. units with vertices (2, - 6), (5, 4) and...

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  15. Delta=|(a(11),a(12),a(13)),(a(21),a(22),a(23)),(a(31),a(32),a(33))| an...

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  16. Let A be a non-singular square matrix of order 3×3. Then abs(adjA) is

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