Hi,I need to solve this equationf''(x) + a*f'(x)^2 +b* f'(x)=0.Any clue?Thanks a lot,Isatis
While harder for this problem, in general, any 2nd order ODE can be reduced to a first order ODE by the substitution
By the chain rule we get
This will change from the dependent variable to the independent variable of a new function u.
This can be solved by an integrating factor.