Get live Maths 1-on-1 Classs - Class 6 to 12
Example 20 - Chapter 4 Class 12 Determinants (Term 1)
Last updated at March 30, 2023 by Teachoo
Examples
Example 1
Example 2
Example 3
Example 4
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
Example 17
Example 18 Important
Example 19
Example 20 You are here
Example 21
Example 22 Important
Example 23
Example 24 Important
Example 25
Example 26 Important
Example 27
Example 28 Important
Example 29
Example 30
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
Chapter 4 Class 12 Determinants
Serial order wise
Transcript
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
