1. The problem statement, all variables and given/known data Solve dW/dx=W(4-2W)^(1/2) 2. Relevant equations 3. The attempt at a solution dW/[W(4-2W)^(1/2)]=dx dW/[W(4-2W)^(1/2)]=x+C I'm unsure of whether to use a u-sub, partial fractions, or a trig substition to integrate. I looked in the back of the book and the answer has a sech in the answer but how to get there?