FE) = + 2=) for allt You are given that the function if – A

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
FE) = + 2=) for allt
You are given that the function
if – A<t < 0
if 0 <t <T
f(t) =
t2
( f(t+27)
for all t
has the complex Fourier series
(-1)"(in?т? + 2nт - 2) + 2і
eint
1
6
n3
n=-00, n#0
What is the real Fourier series of this function?
[(2 — п?т°)(-1)" - 2] сos (nt) + 2nт(-1)" sin(nt)
n3
1
n=0
1
[(2 — п?т?)(-1)" - 2] сos(nt) - 2пт(-1)" sin(nt)
n3
4пт(-1)" сos(nt)
n3
1
27
n=1
2nT(-1)" cos(nt) + [(2 – n²n²)(-1)ª – 2] sin(nt)
1
n3
n=1
None of these.
+
Transcribed Image Text:FE) = + 2=) for allt You are given that the function if – A<t < 0 if 0 <t <T f(t) = t2 ( f(t+27) for all t has the complex Fourier series (-1)"(in?т? + 2nт - 2) + 2і eint 1 6 n3 n=-00, n#0 What is the real Fourier series of this function? [(2 — п?т°)(-1)" - 2] сos (nt) + 2nт(-1)" sin(nt) n3 1 n=0 1 [(2 — п?т?)(-1)" - 2] сos(nt) - 2пт(-1)" sin(nt) n3 4пт(-1)" сos(nt) n3 1 27 n=1 2nT(-1)" cos(nt) + [(2 – n²n²)(-1)ª – 2] sin(nt) 1 n3 n=1 None of these. +
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