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Web skærmformat. - Aarhus Universitet

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IV. Differentialligninger – 2. 1. ordens ligninger 340<br />

Opgave 1 - fortsat<br />

y(x) = Ce 3x<br />

<br />

1<br />

2<br />

som opfylder (y1(0),y2(0)) = C(1,2) = (1,2) fås for C = 1.<br />

Den ønskede løsning skrevet ud<br />

y1(x) = e 3x<br />

y2(x) = 2e 3x<br />

2.32. Opgave ☞ [LA] 15 Lineært system<br />

Opgave 2<br />

Angiv den fuldstændige løsning til differentialligningssystemet<br />

Løsning<br />

Koefficientmatricen er<br />

y ′ 1 = y1 + 2y2 − 8<br />

y ′ 2 = 2y1 + y2 − 7<br />

A =<br />

<br />

1 2<br />

2 1<br />

2.33. Opgave ☞ [LA] 15 Lineært system

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