Get live Maths 1-on-1 Classs - Class 6 to 12
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Example 5 Important
Example 6 Deleted for CBSE Board 2023 Exams
Example 7 Deleted for CBSE Board 2023 Exams
Example 8 Deleted for CBSE Board 2023 Exams
Example 9 Important Deleted for CBSE Board 2023 Exams
Example 10 Important Deleted for CBSE Board 2023 Exams
Example 11 Deleted for CBSE Board 2023 Exams
Example 12 Deleted for CBSE Board 2023 Exams
Example 13 Deleted for CBSE Board 2023 Exams
Example 14 Important Deleted for CBSE Board 2023 Exams
Example 15 Important Deleted for CBSE Board 2023 Exams
Example 16 Important Deleted for CBSE Board 2023 Exams
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Example 20 You are here
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Example 31 Important Deleted for CBSE Board 2023 Exams
Example 32 Important Deleted for CBSE Board 2023 Exams
Example 33 Important
Example 34 Important Deleted for CBSE Board 2023 Exams
Last updated at March 30, 2023 by Teachoo
Example 20 Find minors and cofactors of all the elements of the determinant 1 2 4 3 Minor of a11 = M11 = 1 2 4 3 = 3 Minor of a12 = M12 = 1 2 4 3 = 4 Minor of a21 = M21 = 1 2 4 3 = 2 Minor of a22 = M22 = 1 2 4 3 = 1 Cofactor of a11 = A11 = ( 1)1+1 M11 = ( 1)2 . 3 = 3 Cofactor of a12 = A12 = ( 1)1+2 M12 = ( 1)3 . 4 = ( 1) (4) = 4 Cofactor of a21 = A21 = ( 1)2+1 . M21 = ( 1)3 ( 2) = ( 1) ( 2) = 2 Cofactor of a22 = A22 = ( 1)2+2 . M22 = ( 1)4 . (1) = (1) (1) = 1