GIA'I PHU.O.NG TRNH

2)

Gia'i phu.o.ng trnh:

^{√y.y” =y}

⁰

HD gia’i:

D - a.t

^y

⁰

^{=p⇒y” =pdp}_dy

(ham theo y). Phu.o.ng trnh tro.' thanh:

^√ypdpdy =p

Vo.i

^{p 6= 0}

ta du.o..c phu.o.ng trnh:

^{dp = √dy}_y ^{⇒ p = 2√y+C}

¹

^⇔ _dx^{dy = 2√y+C}

¹

^⇒dx= dy2√y+C

₁

Tu. do nghi^e.m t^o'ng quat:

^{x=√y− C}₂

¹

^ln|2√y+C

¹

^|+C

²

Ngoai ra

^y=c

: hang cu~ng la nghi^e.m.