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cij = (-1) i+j . Mij<br />
c11 = (-1) 1+1 . (-8) = -8<br />
c21 = (-1) 2+1 . (-6) = 6<br />
c31 = (-1) 3+1 . (-3) = -3<br />
A a<br />
11<br />
c<br />
11<br />
a<br />
21<br />
21<br />
a<br />
31<br />
31<br />
1.( 8)<br />
2.6 0. 3<br />
4<br />
Contoh Lain` :<br />
Jika matriks<br />
Jawab :<br />
c<br />
c<br />
3<br />
4 2 7<br />
<br />
2<br />
3 3 2<br />
A maka nilai determinannya adalah ?<br />
5 7 3 9<br />
<br />
2<br />
3 2 3<br />
Dengan menggunakan bari ke-1 (i=1)<br />
c<br />
11<br />
(<br />
1)<br />
11<br />
3 3<br />
7 3<br />
3 2<br />
2<br />
3 9 7 9 7 3 <br />
9 13<br />
3<br />
2 <br />
2 3 3 3 3 2<br />
3 <br />
3(9<br />
18)<br />
3(21<br />
27) 2(14 9)<br />
3(<br />
9)<br />
3(<br />
6)<br />
2(5)<br />
1<br />
c<br />
c<br />
12<br />
13<br />
(<br />
1)<br />
(<br />
1)<br />
12<br />
13<br />
2<br />
5<br />
2<br />
2<br />
5<br />
2<br />
3<br />
3<br />
2<br />
3<br />
7<br />
3<br />
2<br />
3 9 5 9 5 3 <br />
9 12<br />
3<br />
2 <br />
2 3 2 3 2 2<br />
3 <br />
<br />
<br />
<br />
2(9 18)<br />
3(15<br />
18)<br />
2(10 6)<br />
2( 9)<br />
3(<br />
3)<br />
2(4)<br />
( 18<br />
9 8)<br />
1<br />
2<br />
7 9 5 9 5 7 <br />
9 12<br />
3<br />
2 <br />
3 3 2 3 2 3<br />
3 <br />
<br />
<br />
2(21<br />
27) 3(15<br />
18)<br />
2(15 14)<br />
2( 6)<br />
3(<br />
3)<br />
2(1)<br />
1<br />
Modul Matematika SMK Kelas <strong>XII</strong> Semester I<br />
6
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