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Metode Numerik 2 - Universitas Indonesia

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Eliminasi Gauss<br />

<strong>Metode</strong> Eliminasi Gauss mencari solusi sebuah sistem persamaan linear<br />

dengan cara seperti ditunjukkan pada contoh sebelum ini:<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎠<br />

⎞<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎝<br />

⎛<br />

=<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎠<br />

⎞<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎝<br />

⎛<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎠<br />

⎞<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎝<br />

⎛<br />

n<br />

3<br />

2<br />

1<br />

n<br />

3<br />

2<br />

1<br />

nn<br />

n3<br />

n2<br />

n1<br />

3n<br />

33<br />

32<br />

31<br />

2n<br />

23<br />

22<br />

21<br />

1n<br />

13<br />

12<br />

11<br />

b<br />

b<br />

b<br />

b<br />

x<br />

x<br />

x<br />

x<br />

a<br />

a<br />

a<br />

a<br />

a<br />

a<br />

a<br />

a<br />

a<br />

a<br />

a<br />

a<br />

a<br />

a<br />

a<br />

a<br />

⋮<br />

⋮<br />

⋯<br />

⋮<br />

⋱<br />

⋮<br />

⋮<br />

⋮<br />

⋯<br />

⋯<br />

⋯<br />

n)<br />

...,<br />

k,<br />

j<br />

n;<br />

...,<br />

1,<br />

k<br />

i<br />

1;<br />

n<br />

...,<br />

1,<br />

(k<br />

b<br />

a<br />

a<br />

b<br />

b<br />

a<br />

a<br />

a<br />

a<br />

a<br />

b<br />

b<br />

,<br />

a<br />

a<br />

1)<br />

(k<br />

k<br />

1)<br />

-<br />

(k<br />

kk<br />

1)<br />

-<br />

(k<br />

ik<br />

1)<br />

(k<br />

i<br />

(k)<br />

i<br />

1)<br />

-<br />

(k<br />

kj<br />

1)<br />

-<br />

(k<br />

kk<br />

1)<br />

-<br />

(k<br />

ik<br />

1)<br />

-<br />

(k<br />

ij<br />

(k)<br />

ij<br />

i<br />

(0)<br />

i<br />

ij<br />

(0)<br />

ij<br />

=<br />

+<br />

=<br />

−<br />

=<br />

−<br />

=<br />

−<br />

=<br />

=<br />

=<br />

−<br />

−<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎠<br />

⎞<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎝<br />

⎛<br />

=<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎠<br />

⎞<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎝<br />

⎛<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎠<br />

⎞<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎝<br />

⎛<br />

1)<br />

-<br />

(n<br />

n<br />

(2)<br />

3<br />

(1)<br />

2<br />

(0)<br />

1<br />

n<br />

3<br />

2<br />

1<br />

1)<br />

-<br />

(n<br />

nn<br />

(2)<br />

3n<br />

(2)<br />

33<br />

(1)<br />

2n<br />

(1)<br />

23<br />

(1)<br />

22<br />

(0)<br />

1n<br />

(0)<br />

13<br />

(0)<br />

12<br />

(0)<br />

11<br />

b<br />

b<br />

b<br />

b<br />

x<br />

x<br />

x<br />

x<br />

a<br />

0<br />

0<br />

0<br />

a<br />

a<br />

0<br />

0<br />

a<br />

a<br />

a<br />

0<br />

a<br />

a<br />

a<br />

a<br />

⋮<br />

⋮<br />

⋯<br />

⋮<br />

⋱<br />

⋮<br />

⋮<br />

⋮<br />

⋯<br />

⋯<br />

⋯<br />

halaman berikut<br />

i<br />

ij<br />

(m)<br />

i<br />

(m)<br />

ij<br />

b<br />

a<br />

b<br />

a ,<br />

, ≡<br />

pada langkah ke m<br />

28

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