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

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

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

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Ecuat¸ii diferent¸iale cu variabile separate 15<br />

2. Sǎ se rezolve urmǎtoarele probleme Cauchy ¸si sǎ se reprezinte solut¸iile (cu<br />

calculatorul):<br />

a) ˙x = √ t x, t > 0, x > 0, t0=1, x0=0<br />

R: x(t) = 0<br />

√<br />

4−x2 b) ˙x=−2t , t∈IR<br />

x<br />

1 , x∈(0, 2), t0=0, x0=1<br />

R: √ 4−x 2 −t 2 − √ 3=0<br />

c) ˙x= 1<br />

1−t ·1−x2<br />

x , t < 1, x∈(0, 1), t0=0 x0= 1<br />

2<br />

<br />

R: x(t)=<br />

− 3<br />

4 t2 + 3<br />

2 t+1<br />

4

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