Hans Juergen Weber, Frank Ephraim Harris, George Brown Arfken, Mathematical Methods for Physicists; A Comprehensive Guide, 7th edition (Academic Press, 2012)
Chapter 1. Mathematical Preliminaries 제1장. 예비 수학
Section 2. Series of Functions 제2절. 함수의 급수
예제(Exercise) 16 및 해설(Solution)
A power series converges for -R < x < R. Show that the differentiated series and the integrated series have the same interval of convergence. (Do not bother about the endpoints x = ±R.)
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제1장 제1절 무한급수 https://gall.dcinside.com/physicalscience/195428
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