20. Let f be a continuous function with a period 27, and ao +(an cos nx + bn sin nx) 2 its Fourier series. If f (x) > 0 for every real number x, then ao > 0.
20. Let f be a continuous function with a period 27, and ao +(an cos nx + bn sin nx) 2 its Fourier series. If f (x) > 0 for every real number x, then ao > 0.
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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q.20 true or false ?
Transcribed Image Text:20. Let f be a continuous function with a period 27, and
ao
Σ(an cos nx + bn sin nx)
2
its Fourier series. If f(x) > 0 for every real number x, then ao > 0.
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