# Odinary Differential Equation Question Help!

• Mar 5th 2013, 03:45 AM
sofv66
Odinary Differential Equation Question Help!
Hi, I really need help on this ODE question.
Attachment 27362
Thanks,
Sofina
• Mar 5th 2013, 07:55 PM
chiro
Re: Odinary Differential Equation Question Help!
Hey sofv66.

Show us what you have tried.
• Mar 6th 2013, 11:33 AM
sofv66
Re: Odinary Differential Equation Question Help!
So, dy/dx=3y^2/3
int y^-2/3 = int 3
3y^1/3 = 3x +c
y=(x+c)^3
is all I have done.
Can you help me to finish the question please.
Thank you.
• Mar 6th 2013, 03:46 PM
chiro
Re: Odinary Differential Equation Question Help!
I'm guessing that this function is defined only for an initial value onwards.

If this is the case, you need to substitute in your initial value into your function to obtain a value of c and show that the function has the right form.

So your initial value is at x = a with f(a) = b.

You can say that for this problem, you only define function from the initial value onwards to justify the zero before x = a.
• Mar 9th 2013, 12:35 AM
jomex42
Re: Odinary Differential Equation Question Help!
Attachment 27445

can you solve this and you will get the result of
arctan(α/s)