Given f (x) = |x| for x € [-,1 Show that cos(2n – 1)x (2n – 1)2 4 |x\ = ; 2 n=1

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
2.
Given
f (x) = |x| for x € [-n,1]
Show that
4
cos(2n – 1)x
|x| = =-72
(2n – 1)2
n=1
Transcribed Image Text:2. Given f (x) = |x| for x € [-n,1] Show that 4 cos(2n – 1)x |x| = =-72 (2n – 1)2 n=1
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