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May 19, 2021 9:57 pm 30 pts
The function f(t) is a periodic function of period 21t. In the range (-T, 1), it equals e. If f(t) = ce denotes its Fourier series expansion, the sum e.f is (1) 1 (2) 2T sinh(27) (3) cosh(27) (4) ZT ZT
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• Prashant kumar
option b is correct