Posted by **malcolm** on Saturday, February 12, 2011 at 12:53pm.

Find in implicit form the general solution of differential equation dy/dx=2(e^x-e^-x)/y^2(e^x+e^-x)^4 with (y>0). I know this requires a seperation of variables but I beyond that I am confused by how.Thanks.

- calculus differential equation -
**bobpursley**, Saturday, February 12, 2011 at 3:56pm
dy/dx=2(first )/y^2 (second)

y^2 dy=2(first)dx/(second)

so lets look at the right side.

2(e^x-e^-x)/(e^x+e^-x)^4

factor out e^-x

numerator: 2e^-x(e^2x)

denominator(factor out e^-4x)

e^-4x (e^2x-1)^2

so you are left on the right side:

2*e^3x(e^2x -1)/(e^2x+1) dx

or = 2(e^5x)/(e^2x+1) dx + 2e^3x/(e^2x+2) dx

- calculus differential equation -
**mike**, Tuesday, February 15, 2011 at 12:41pm
thanks Bob much appreciated. Do I then take the integral of the last line? And is the left hand side 1/3y^3 (from y^)? I do not know how this fits together. Thanks for any further help

## Answer this Question

## Related Questions

- calculus differential equation - Find in implicit form the general solution of ...
- calculus-differential equation - Consider the differential equation: (du/dt)=-u^...
- calculus - Please help. How do I seperate the variables in the following ...
- calculus - Sorry to post this again, but I am still unable to understand it and ...
- Calculus - Find the general solution for the differential equation. Leave your ...
- maths - find in implicit form, the general solution of the differential equation...
- math - find general solution in implicit form of differential equation dy/dx= 2(...
- differential equations - solve the differential equation by seperation of ...
- calculus - verify that y=c/x^2 is a general solution of the differential ...
- mathematics - find the general solution to the following differential equation ...