4. Show that the series f(x) = E cos(nx) ni+ 2021 converges uniformly on R. Use this to show that f is integrable on [0, 27] and fo" f(x)dx = 0.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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4. Show that the series
cos(nx)
f (x) =
E
1+ 21
n=1
converges uniformly on R. Use this to show that f is integrable on [0, 27]
27
and " f(x)dx = 0.
Transcribed Image Text:4. Show that the series cos(nx) f (x) = E 1+ 21 n=1 converges uniformly on R. Use this to show that f is integrable on [0, 27] 27 and " f(x)dx = 0.
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