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Monday, July 14, 2014

Solving Equations - Homogeneous Functions, 8

Category: Differential Equations

"Published in Vacaville, 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? An exponential function is a combination of x and y in the function 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