Please solve asap my deadline is approaching 5 Let f: R R be a continuous 27-periodic function whose Fourier series is+∞11cos(nx).√3nThen the quadratic norm of f equals(A) T(B) 2T(C) √(D) √2T12+n=1

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Answered: Let f: RR be a continuous 27-periodic…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Let f: RR be a continuous 27-periodic function whose Fourier series is +∞ 1 1/2 + + /20 cos(nx). n=1 Then the quadratic norm of f equals (A) T (B) 2 (C) √ (D) √2T