I have been trying to work out how to solve this example question I found in a recommended text,
Everywhere I've been reading starts with since y=eta(x) is a particular solution then y=eta(x) + u is a general solution, but the question doesn't state eta(x) as a particular solution, is that a problem?
Anyway in this question is the way to go simply subbing in y = eta + 1/si then noting that all the lone eta components cancel since they are a solution themselves.
But when I do that,
I end up with something like
and I can't rearrange it to form the equation which si solves,
any idea on what i've done wrong?
p.s. Has latex been removed from forum?