GIA'I PHU.O.NG TRNH

41) - 201-bai-tap-phuong-trinh-vi-phan
201-bai-tap-phuong-trinh-vi-phan
41)

Gia'i phu.o.ng trnh:

y

0

+xy=x

3

HD gia’i:

Nghi^e.n t^o'ng quat cu'a phu.o.ng trnh thu^an nh^at

y=Ce

−

x

2

2

bi^en thi^en hang s^o:

C(x) = (x

2

−2)e

−

x

2

2

+ε

V^a.y nghi^e.m t^o'ng quat:

y=εe

−

x

2

2

+x

2

−2.