Here's the equation $\displaystyle \frac{dx}{\frac{ay}{x^2+y^2}}=\frac{dy}{\frac{ax}{ x^2+y^2}} $

how is this one done separating variables seems impossible

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- Nov 21st 2009, 03:56 AMphycdudeNot by separating variables
Here's the equation $\displaystyle \frac{dx}{\frac{ay}{x^2+y^2}}=\frac{dy}{\frac{ax}{ x^2+y^2}} $

how is this one done separating variables seems impossible - Nov 21st 2009, 06:17 AMJester
- Nov 21st 2009, 10:38 AMphycdude
well thats what beats me too , i have no idea whether that would be legitimate ,

now this was not the question itself, i was just wondering, but here is what drove me to ask ,

MathBin.net - Untitled

if u like i can post the stuff here, im stumped. - Nov 22nd 2009, 04:46 AMHallsofIvy
- Nov 22nd 2009, 06:39 AMphycdude
[QUOTE=HallsofIvy;409885]Yes, of course that's legitmate. Your equation is simply [tex]\frac{dx}{y}= \frac{dy}{x}

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which is the same as xdx= ydy.