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Laborator 4: Ecuatii cu derivate partiale

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5. Să se rezolve urmatoarele EDP de ordinul 2.:<br />

(a) uxx − 4uyy = 0;<br />

(b) 4uxx − 4uxy − 2uyy = 0;<br />

(c) x 2 uxx + 4y 2 uyy = 0<br />

(d) uxx + x 2 y 2 uyy = 0;<br />

6. Se considera e<strong>cu</strong>at¸ia:<br />

xfy − yfx = 0<br />

(a) Să se rezolve e<strong>cu</strong>at¸ia.<br />

(b) Să se reprezinte grafic solut¸iile parti<strong>cu</strong>lare obt¸inute pentru funct¸iile<br />

generatoare: F (t) = ln(t), F (t) = e t , F (t) = sin(t).<br />

2

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