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Web skærmformat. - Aarhus Universitet

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IV. Differentialligninger – 1. Grafiske/numeriske metoder 318<br />

Retningsfelt<br />

y<br />

1<br />

0 1<br />

1.14. Eulers metode ☞ [S] 7.2 Direction fields and Euler’s method<br />

Eulers metode<br />

For begyndelsesværdiproblemet<br />

y ′ = x + y, y(0) = 1<br />

prøver vi at tilnærme løsningen y(x) med differentialet i små intervaller.<br />

I et givet punkt (xn,yn) vil differentialet være<br />

dy = (xn + yn)dx<br />

x

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