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Thursday, April 23, 2015

Separation of Varaiables - Arbitrary Constant, 9

Category: Differential Equations

"Published in Newark, California, USA"

Find the particular solution for


when x = 2; y = 1.

Solution:

Consider the given equation above   


By separation of variables, transfer y to the right side of the equation and x 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




Substitute the values of x and y in order to solve for C as follows  




Therefore, the particular solution is 






Wednesday, April 22, 2015

Separation of Variables - Arbitrary Constant, 8

Category: Differential Equations

"Published in Newark, California, USA"

Find the particular solution for


when x = 2; y = 3.

Solution:

Consider the given equation above  


Express y' as dy/dx as follows 



By separation of variables, transfer x and dx to the right side of the equation and 1 + y² 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 





Substitute the values of x and y in order to solve for C as follows 






Therefore, the particular solution is