TM NGHI^E.M T^O'NG QUAT CU'A PHU.O.NG TRNH VI PH^AN
125)
Tm nghi^e.m t^o'ng quat cu'a phu.o.ng trnh vi ph^an:
(x+ex
y
)dx+ex
y
(1−xy)dy= 0.HD gia’i:Phu.o.ng trnh vi ph^an toan ph^an co tch ph^an t^o'ng quat;
x2
2 +yex
y
=C