1. The problem statement. 1. http://img194.imageshack.us/img194/3815/linear.png [Broken] 2. http://img25.imageshack.us/img25/1543/bernoulli1.jpg [Broken] 3. http://img23.imageshack.us/img23/7991/bernoulli2.jpg [Broken] 2.Relevant equations Problem 1 is Linear Differential Equation and Problems 2 and 3 are Bernoulli's D.E. LDE is given by: dy/dx + yP(x) = Q(x) BDE is given by: dy/dx + yP(x) = Q(x)y^n 3. The attempt at a solution On those three equations, I'm trying to make the equations as exactly to the format on the LDE and BDE. However, I cannot get P(x) and Q(x) on no.1. The y is always y^3. In no.2, there will be Q(x)y^n and there is no y. In no.3, I solved that. However, that problem is BDE and I solved it using LDE with dx/dy. Do you think there is something wrong with the equation? Thank you.