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Web skærmformat. - Aarhus Universitet

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IX. Opgaver – 2. Januar 2003<br />

<br />

564<br />

A(x) = a(x)dx = −x −1 dx = −lnx<br />

<br />

B(x) = e −A(x) <br />

b(x)dx = e ln x 2x −1 dx<br />

= 2x<br />

2.26. Løs differentialligning ☞ Matematik Alfa 1, Januar 2003<br />

Opgave 5 - løsning<br />

Som giver fuldstændig løsning<br />

y(x) = Ce A(x) + B(x)e A(x)<br />

= Ce − ln x − ln x<br />

+ 2xe<br />

= C 1<br />

+ 2<br />

x<br />

2.27. Løs differentialligning ☞ Matematik Alfa 1, Januar 2003

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