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Metode Numerik 2 - Universitas Indonesia

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Modifikasi dilakukan dalam memilih<br />

nilai f(x,y) yang dianggap konstan.<br />

Dipilih f(x,y) pada titik 1 x h : =<br />

Diperoleh:<br />

y(x<br />

0<br />

1<br />

1<br />

f(x0 + h, y(x0<br />

+ 2 h))<br />

+ h) ≅<br />

≅<br />

y<br />

y<br />

0<br />

0<br />

+ hf(x<br />

+ hf(x<br />

0<br />

0<br />

+<br />

+<br />

<strong>Metode</strong> Euler yang Dimodifikasi<br />

1<br />

2<br />

1<br />

2<br />

x 0 2 +<br />

1<br />

dengan y(x0 h) 2 dihitung memakai<br />

metode Euler:<br />

+<br />

1<br />

1<br />

y(x0 + h) ≅ y0<br />

+ hf(x0,<br />

y0)<br />

2<br />

2<br />

2<br />

h, y(x<br />

h, y<br />

0<br />

+<br />

0<br />

1<br />

2<br />

+<br />

1<br />

2<br />

h))<br />

hf(x<br />

0<br />

, y<br />

0<br />

))<br />

f(x,y)<br />

y(x)<br />

y0<br />

x0 x0 + h<br />

1 x0 2 +<br />

h<br />

x0 x0 + h<br />

1 x0 2 +<br />

h<br />

1<br />

1<br />

f(x0 + h, y(x0<br />

+ 2 h))<br />

x<br />

x<br />

2<br />

y(x0 + h)<br />

yg diperoleh<br />

y(x0 + h)<br />

sebenarnya<br />

113

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