I need in 3-4 hours. please atleast do 2-3 parts. will give a
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3. The function f() is periodic with period 2T, and is defined in the interval -T < x < T to be
0>x>- >x>0
where a is a positive constant.
(i) Sketch f() for --3T < x < 3T. Is this function even or odd or neither?
[4 marks]
(ii) Find the Fourier series for f()
[11 marks]
(iii) By equating the values of the series and the original function at = Tr/2, show that
1 + 3 5
1 1 1 7 9
TT
1
4
[5 marks]
(iv) By integrating the series and the original function with respect to x and setting = Tr/2, show that 1 1 1 1 TT2 72 92 8
[5 marks]
In this question you may quote the standard results for the Fourier series and the Fourier coefficients in the form:
[an cos(nx)+ bn sin(nx)]
f(x) cos(nx)dx,
n=
f(x) sin(nx)dx(n>0)
[Total: 25 marks]