∆ = (– ) + a + (– ) + a + (– ) + a = a A + a A + a A , where A ij is cofactor of a ij = sum of product of elements of R with their corresponding cofactors Similarly, ∆ can be calculated by other five ways of expansion that is along R , R , C , C and C . Hence ∆ = sum of the product of elements of any row (or column) with their corresponding cofactors.
📖 generic · CBSE Class 12th English Medium · MATHEMATCS PART-1 · Page 1question
DETERMINANTS · Part 8
Chapter 4: DETERMINANTS · MATHEMATCS PART-1
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