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Friday, April 3, 2015

Separation of Variables, 31

Category: Differential Equations

"Published in Vacaville, California, USA"

Find the general solution for


Solution:

Consider the given equation above  


Perform the algebraic operations and group according to their variables as follows





By separation of variables, transpose (1 - b cos θ) to the right side of the equation and r to the left side of the equation as follows  



Integrate on both sides of the equation, we have 





Take the inverse natural logarithm on both sides of the equation, we have 




Therefore, the general solution is  

Thursday, April 2, 2015

Separation of Variables, 30

Category: Differential Equations

"Published in Vacaville, California, USA"

Find the general solution for


Solution:

Consider the given equation above 


By separation of variables, transpose y to the right side of the equation and (4 + e2x) to the left side of the equation as follows 



Integrate on both sides of the equation, we have 






Take the inverse natural logarithm on both sides of the equation, we have 







Therefore, the general solution is 


where E = C²
 

Wednesday, April 1, 2015

Separation of Variables, 29

Category: Differential Equations

"Published in Vacaville, California, USA"

Find the general solution for


Solution:

Consider the given equation above 


By separation of variables, transpose dP to the right side of the equation and V to the left side of the equation as follows 



Integrate on both sides of the equation, we have 






Take the inverse natural logarithm on both sides of the equation, we have  




Therefore, the general solution is