What does "find the dx/dy of (eq inside) for x>0" mean?

[randy17]

1. The problem statement, all variables and given/known data

find dy/dx for the function xy^2+xlnx=4y for x>o

2. Relevant equations

xy^2+xlnx=4y

3. The attempt at a solution

I found the dy/dx to be "(y^2+lnx+1)/(4-x)=dx/dy"
What is it asking me to do with the x>0? Do they want me to plug in a value greater than 0 for x and solve for y? or what?

Edited June 7, 2013 by randy17

[daniton]

No,the function ln(x) is not defined for x<=0