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CBSE Class 12 Maths 2010 Solved Paper

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Question : 7
Total: 29
Find the minor of the element of second row and third column (a23) in the following determinant:
|
2−35
604
15−7
|
Solution:  
Given determinant = |
2−35
604
15−7
|
Minor of the element a23 is M23
Obtained by deleting III column and II row
M23 = |
2−3
15
|
= 10 - (- 3)
= 13
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