The sum of the products of elements of any row with the cofactors of corresponding elements is equal to ___.

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T h e     s u m     o f     t h e     p r o d u c t s     o f     e l e m e n t s     o f     a n y     r o w     w i t h     t h e     c o − f a c t o r s     o f     c o r r e s p o n d i n g     e l e m e n t s is  equal  to  the  value  of  the  determinant  of  the given  matrix. L e t     Δ = | a 1 1 a 1 2 a 1 3 a 2 1 a 2 2 a 2 3 a 3 1 a 3 2 a 3 3 | E x p a n d i n g     a l o n g     R 1     a 1 1 | a 2 2 a 2 3 a 3 2 a 3 3 | − a 1 2 | a 2 1 a 2 3 a 3 1 a 3 3 | + a 1 3 | a 2 1 a 2 2 a 3 1 a 3 2 | ⇒ a 1 1 M 1 1 + a 1 2 M 1 2 + a 1 3 M 1 3                                       ( where  M11,M12  and  M13  are  the  minors  of  the  corresponding  elements )

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Maths NCERT Exemplar Solutions Class 12th Chapter Four 2025

Maths NCERT Exemplar Solutions Class 12th Chapter Four 2025

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