# REQ Solution to differential equation

1. Mar 21, 2008

### Kurret

Find the solution to $$\frac{c}{y^2}+k=y''$$

I have not started with differential equations yet, so i hav eno idea if its possible to solve, but i stumbled upon it when investigating a physics idea i got. Thanks for any help!

Last edited: Mar 21, 2008
2. Mar 22, 2008

### Kurret

3. Mar 22, 2008

### MathematicalPhysicist

well we can first sketch a solution for y''=k which is y=kx^2/2+Ax+B
but for: y''y^2=c I don't think there's an analytical answer.

4. Mar 22, 2008

### dextercioby

Multiply by y' and you'll be able to integrate both terms of the new equation.

5. Mar 23, 2008

### Kurret

How?? Cant make it work...