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Thursday, July 3, 2014

Solving Equations - Homogeneous Functions, 3

Category: Differential Equations

"Published in Newark, California, USA"

Find the general solution for


Solution:

Consider the given equation above 


Did you notice that the given equation cannot be solved by separation of variables? The first term is a combination of x and y in the group and there's no way that we can separate x and y. 

This type of differential equation is a homogeneous function. Let's consider this procedure in solving the given equation as follows



Let


so that


Substitute the values of y and dy to the given equation, we have 





The resulting equation can now be separated by separation of variables as follows 




Integrate on both sides of the equation, we have 



But



Hence, the above equation becomes






Therefore, the general solution is