25. Find the interval of convergence of the sum A. -14
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Question
Solve q25 only
Transcribed Image Text:24. Find a power series for the function 4cos (-) centered at x = 0.
A.
25.
B.
C.
4
E.
00
n=0
1=0
(-1)", 2-
42 (2n)!
(-1), 2
(-1)+12+1
(2n + 1)!
D. 4⁰⁰ (-1)"+1,2″
4-0
(2n)!
-.
n2n+1
(-1)",2n
42n (2n)!
0
Find the interval of convergence of the sum
A.
B.
C.
D.
E. - 14 ≤x≤8
14<x<8
124 <x< 118
124 <x< 118
[..
-1
-∞0<x<∞
(x²+6x +9)"
121" n
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