Page 97 - DMTH201_Basic Mathematics-1

Basic Mathematics – I

Notes
43 12 34
Adj A 10 8 4
9 4 2

43 12 34
Adj A 1
A 1 10 8 4
| | 56
A
9 4 2
43 3 17
56 14 28
5 1 1
i.e., A 1
28 7 14
9 1 1
56 14 28

2 1 1
8. Let A 1 2 0
3 4 5

2 1 1
A
| | 1 2 0
3 4 5

2( 10 0) 1( 5 0) 1(4 6)

20 5 2 27 0
Cofactor of 2 = + ( 10 0) = 10
Cofactor of 1 = ( 5 0) = 5 I column
Cofactor of 1 = + (4 6) = 2
Cofactor of 1 = (5 4) = 1

Cofactor of 2 = + ( 10 3) = 13 II column
Cofactor of 0 = (8 + 3) = 11
Cofactor of 3 = + (0 2) = 2

Cofactor of 4 = (0 1) = 1 III column
Cofactor of 5 = + (4 + 1) = 5

10 1 2
Adj A 5 13 1
2 11 5

10 1 2
Adj A 1
A 1 5 13 1
| | 27
A
2 11 5

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