Help me find: Mathematics (Introduction/infinite series).

[1stclass_only]

I am looking for a mathematics introduction/linear/series/ book can't remember specific title.  I have only one image of it...  Which is on:  Page 492 Chapter 11  Representing Functions by Power Series.  Power series 11.2.1:  A series of the Form, at the Top of page...  Theorem 11.2.2 with Proof is at the bottom of page.

I would show the photo of the page but stupid ebay will not let me show the image...  I don't know something about copywrite **bleep**...  I just want the book.  A picture was taken by someone on ebay and then the book disappeared. 

Not a single Book dealer on EBAY will help.   How hard can it be to find a large Hard cover Mathematics book with more than 500 pages in it and take a look at page 492?  People should always show a page of two when selling a book so you can get the gist of what is being sold but just remember not end sale before customers can buy it.