Use a suitable trial function to find the particular solution of

From the equation,

Now I don't understand the last bit where you have to pick the two parts which correspond to 0 and 3. Could someone explain it for me?

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- Feb 10th 2009, 01:31 PMHarisFinding the PS (of a DE)
Use a suitable trial function to find the particular solution of

From the equation,

Now I don't understand the last bit where you have to pick the two parts which correspond to 0 and 3. Could someone explain it for me? - Feb 10th 2009, 03:55 PMdanothy
For an equation of the form:

(in this case and )

For this case:

and hence

So to the guts of the problem (remembering the constant of integration at this stage):

Checking:

To determine C you'll need a known point