GIA'I PHU.O.NG TRNH

40)

Gia'i phu.o.ng trnh:

^{xy” = y}

⁰

^+xHD gia’i:

D - a.t

^y

⁰

^=p;

phu.o.ng trnh tro.' thanh:

^p

⁰

^{− 1}xp= 1

Nghi^e.m t^o'ng quat:

^p=Cx

bi^en thi^en hang s^o:

^{C = ln|x|+C}

1

Z⇒p= dy(ln|x|+C

₁

)xdx+C

₂

dx = (ln|x|+C

₁

)x⇒y==C

1

x

²

+ x

²

2 ln|x| − x

²

4 +C

2