(a) Find the Fourier series for the periodic function defined by f(x) ex, –n s x < T. Hint: Recall that sinh x = (e* – e-*)/2.

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Chapter2: Second-order Linear Odes
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5. (a) Find the Fourier series for the periodic function defined by f(x) =
ex, -n s x < T. Hint: Recall that sinh x = (ex – e-x)/2.
(b) Sketch the graph of the sum of this series on the interval
-5n s x < 5x.
(c) Use the series in (a) to establish the sums
1
1
n² +1
-1
2 tanh n
and
(-1)"
1
1
2 sinh
n² +1
Transcribed Image Text:5. (a) Find the Fourier series for the periodic function defined by f(x) = ex, -n s x < T. Hint: Recall that sinh x = (ex – e-x)/2. (b) Sketch the graph of the sum of this series on the interval -5n s x < 5x. (c) Use the series in (a) to establish the sums 1 1 n² +1 -1 2 tanh n and (-1)" 1 1 2 sinh n² +1
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