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Capitolul 1 Ecuatii diferentiale de ordinul ˆıntâi rezolvabile prin ...

Capitolul 1 Ecuatii diferentiale de ordinul ˆıntâi rezolvabile prin ...

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34 CAPITOLUL 1<br />

4. Sǎ se rezolve ecuat¸iile diferent¸iale ¸stiind cǎ ele admit factor integrant<br />

µ = µ(x):<br />

x(1 − t x)<br />

a) ˙x = −<br />

−t<br />

b) ˙x = −<br />

2t x<br />

3x 2 − t 2 + 3<br />

R: µ(x) = 1<br />

x 2<br />

t t2<br />

−<br />

x(t) 2<br />

R: µ(x) = 1<br />

x 2<br />

= C<br />

t2 + 3x(t) = C<br />

x(t)

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