Let f(a) be a function of period 27 such that f (x) = x over the interval -7

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section5.2: Exponential Functions
Problem 31E
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Exercises 4
Let f(x) be a function of period 27 such that
f (x) = x? over the interval - T < x <T.
a) Sketch a graph of f(x) in the interval -37 < x < 37
b) Show that the Fourier series for f(x) in the interval -T <x < T is
- 4 ICOS -
3
1
cos 2.x +
22
1
cos 3.r
32
c) By giving an appropriate value to a, show that
1
= 1+
22
1
1
+...
42
6.
32
Transcribed Image Text:Exercises 4 Let f(x) be a function of period 27 such that f (x) = x? over the interval - T < x <T. a) Sketch a graph of f(x) in the interval -37 < x < 37 b) Show that the Fourier series for f(x) in the interval -T <x < T is - 4 ICOS - 3 1 cos 2.x + 22 1 cos 3.r 32 c) By giving an appropriate value to a, show that 1 = 1+ 22 1 1 +... 42 6. 32
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