Question

please can some one give me a very self teaching book for power series of a differential equation

Answer 1

https://www.khanacademy.org/math/differential-equations

Answer 2

As far as I know, Khan doesn't have any lessons on power series solutions. You can try Paul's notes here: http://tutorial.math.lamar.edu/Classes/DE/SeriesSolutions.aspx

And of course there are plenty of lessons to find on YouTube. PatrickJMT has a pretty neat channel that goes over several examples. Here's a video of his on series solutions: https://www.youtube.com/watch?v=6csP7dw0XTY

Answer 3

As for textbooks, I haven't gone through it myself, but you can find a free copy of Zill's most recent text of DE's, as well as a copy of the 7th edition with BVPs. It might be worth checking out.

Answer 4

ok thanks