Answer
$$\sum^{\infty}_{n=2} a_{n-2}x^{n}$$
Work Step by Step
1. Substitute each $n$ in the expression for a $n-2$:
$$\sum^{\infty}_{n-2=0} a_{n-2}x^{n-2+2}$$ $$
\sum^{\infty}_{n=2} a_{n-2}x^{n}$$
Elementary Differential Equations and Boundary Value Problems 9th Edition
by Boyce, William E.; DiPrima, Richard C.
Published by
Wiley
ISBN 10:
0-47038-334-8
ISBN 13:
978-0-47038-334-6
Chapter 5 - Series Solutions of Second Order Linear Equations - 5.1 Review of Power Series - Problems - Page 249: 22
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