In this page, I will post the solution of the exercise problem in the Mathematical Methods for Physicists (sixth edition), written by Arfken & Weber. You can buy the book via https://www.amazon.com/Mathematical-Methods-Physicists-George-Arfken/dp/0120598760/ref=sr_1_1?s=books&ie=UTF8&qid=1509339806&sr=1-1&keywords=Mathematical+Methods+for+Physicists+6th.
Arfken & Weber, Mathematical Methods for Physicists, Sixth Edition
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