Solve:

y''=yy'/x

And show that y=c_{3}is a solution of the problem too.

where y'=dy/dx

How to solve it?

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- October 29th 2013, 02:20 PMblocnthow to solve this?
Solve:

y''=yy'/x

And show that y=c_{3}is a solution of the problem too.

where y'=dy/dx

How to solve it? - October 29th 2013, 02:34 PMHallsofIvyRe: how to solve this?
The second question is easy: if y is a constant, then both y' and y'' are 0 so the equation becomes 0= 0.

- October 30th 2013, 09:32 AMtopsquarkRe: how to solve this?
Well I have a stab at it that might lead somewhere. But I can't finish it. Perhaps it will give someone an idea.

Do you have initial conditions on this?

Note that and that .

Then

where a is the accumulated integration constant.

My hope was for a Bernoulli equation, but we have that extra constant that seems to screw things up. I can't find a way to proceed from here.

-Dan

Edit: I was hoping that, since y = constant was a solution (leading to a =0 in the above equation) would help, but it leads to a Bernoulli equation where y = constant is not a solution to the Bernoulli, so this doesn't help. - November 27th 2013, 06:13 AMJesterRe: how to solve this?
I know a little late but the ODE is now separable.