5. (a) Find the Fourier series for the periodic function defined by f(x) = e*, –n < x < T. Hint: Recall that sinh x = (e* – e-*)/2. (b) Sketch the graph of the sum of this series on the interval -5n s x s 5n. (c) Use the series in (a) to establish the sums 1 1 n' +1 2 tanh t and (-1)" n² +1 1 %3D 2 sinh T d: To what value does the series converge at the points of discontinuity?

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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5. (a) Find the Fourier series for the periodic function defined by f(x) =
e*, –n < x < T. Hint: Recall that sinh x = (e* – e-*)/2.
(b) Sketch the graph of the sum of this series on the interval
-5n s x s 5n.
(c) Use the series in (a) to establish the sums
1
1
n' +1
2 tanh t
and
(-1)"
n² +1
1
%3D
2 sinh T
d: To what value does the series converge at the points of discontinuity?
Transcribed Image Text:5. (a) Find the Fourier series for the periodic function defined by f(x) = e*, –n < x < T. Hint: Recall that sinh x = (e* – e-*)/2. (b) Sketch the graph of the sum of this series on the interval -5n s x s 5n. (c) Use the series in (a) to establish the sums 1 1 n' +1 2 tanh t and (-1)" n² +1 1 %3D 2 sinh T d: To what value does the series converge at the points of discontinuity?
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