Page 91 - DMTH201_Basic Mathematics-1

Basic Mathematics – I

Notes Cofactor of 7 = + (2) = 2 II column
7 1
Adj A
4 2

1 5
2. A
2 8
Cofactor of 1 = + (8) = 8
Cofactor of 5 = (2) = 2 I column
Cofactor of 2 = (5) = 5

Cofactor of 8 = + ( 1) = 1 II column

8 5
Adj A
2 1

3 0
3. A
5 9
Cofactor of 3 = + (9) = 9

Cofactor of 0 = (5) = 5 I column
Cofactor of 5 = (0) = 0
Cofactor of 9 = + (3) = 3 II column

9 0
Adj A
5 3

2 1 5
4. A 4 0 1
9 3 6

Cofactor of 2 = + (0 + 3) = 3
Cofactor of 1 = (24 9) = 15 I column
Cofactor of 5 = + ( 12 0) = 12
Cofactor of 4 = ( 6 + 15) = 9

Cofactor of 0 = + (12 45) = 33 II column
Cofactor of 1 = ( 6 + 9) = 3
Cofactor of 9 = + ( 1 0) = 1
Cofactor of 3 = (2 20) = 18 III column

Cofactor of 6 = + (0 + 4) = 4

3 9 1
Adj A 15 33 18
12 3 4

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