How Can This Nonlinear Differential Equation Be Solved?

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SUMMARY

The discussion centers on solving the nonlinear differential equation ay' + by = (y' + cy)^2 + d, where a, b, c, and d are positive constants. The initial conditions provided are y(0) = 0 and y''(0) = k*d, with k being a positive constant. A key insight is that having two initial conditions for a first-order ordinary differential equation (ODE) necessitates a specific relationship between the coefficients; otherwise, a valid solution cannot be derived. Participants emphasize the importance of satisfying this relationship to proceed with solving the equation.

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Pachito
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Hi everybody.
Not very good in solving DE's. Here is one for the better:

ay'+by = (y'+cy)^2+d

where a,b,c and d are real positive constants.

I know that : y(0)=0 and y''(0)=k*d (k= real positive constant)

Any possible suggestions?
Thanks
Pachito
 
Last edited:
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I know that : y(0)=0 and y''(0)=k*d (k= real positive constant)
Two initial conditions are too much for a first oreder ODE. This implies a relationship between the coefficients of the ODE. If this relationship is not satisfied, no valid solution can be derived. See attachment :
 

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Thank you very much for the illumination
 

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