Could someone solve these: xyy'+y^2=sinx by letting y^2=v y'=2/(x+2y-3) by letting x+2y-3=v 2y'y''=1+(y')^2 by letting y'=v or explain one and if they are similar then i'd be fine?
Last edited by Monster32432421; Aug 12th 2010 at 07:37 AM.
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Originally Posted by Monster32432421 Could someone solve these: xyy'+y^2=sinx or explain one and if they are similar then i'd be fine? Hint: Multiply both sides of the equation by
Originally Posted by Monster32432421 Could someone solve these: 2y'y''=1+(y')^2 by letting y'=v or explain one and if they are similar then i'd be fine? Hint:
Originally Posted by DeMath Hint: Multiply both sides of the equation by I actually forgot to write the substitute for it... sorry... it's y^2=v
Originally Posted by DeMath Hint: how did you get from... to
If you let then and you get (separable).
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