9. Let f(æ)= X[a,b) (x) be the characteristic function of the interval [a, b] c [-7, 7], that is, Į 1 if r € (a, b), 0 otherwise. X[a,b} (x) = %3D (a Show that the Fourier series of ƒ is given by b - a f(r) ~ 27 e-ina – e-inb eina 2nin The sum extends over all positive and negative integers excluding 0.
9. Let f(æ)= X[a,b) (x) be the characteristic function of the interval [a, b] c [-7, 7], that is, Į 1 if r € (a, b), 0 otherwise. X[a,b} (x) = %3D (a Show that the Fourier series of ƒ is given by b - a f(r) ~ 27 e-ina – e-inb eina 2nin The sum extends over all positive and negative integers excluding 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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