Question: Analytical solution of ODE?

Hi, I am tryig to solve ode with the perturbation method but getting an error.  can anyone correct my fil and i also want to draw the graph of the involved parameter beta and how can I compare the result obtained through the perturbation method with the numerical result?.... beta is very very small like 0.1..0.9...

In my maple sheet the whole ode is equati=al q which is q=dp/dx and also want to involve its zero and first-order terms like dp0/dx, dp1/dx in the obtained result of u.

Respected Comunity waiting for your kind response

Help_perturbation.mw

 

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