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

`a_(11)a_(11)+a_(12)A_(21)+aB_(3)A_(3)`

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

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

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BETTER CHOICE PUBLICATION-DETERMINANTS -ASSIGNMENT (PREVIOUS YEAR.S BOARD QUESTIONS FOR PRACTICE )

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