Explore BrainMass

# Fourier Series of a Periodic Fuction : Convergence

Not what you're looking for? Search our solutions OR ask your own Custom question.

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

Work out the Fourier series of f, given over one period as follows.
At which values of x does the series fail to converge to f(x)? To what values does it converge at those points?

(h) |cos x| for all x
(k) x on 0<x<1, 1<x<2.

See the attached file.

https://brainmass.com/math/fourier-analysis/fourier-series-periodic-fuction-convergence-43795

#### Solution Preview

Please see the attached file for the complete solution.

Solution. By a theorem which states, if y=f(x) is a periodic function and y=f(x) is continuous at x=a, then its Fouries series converges to x=a; if y=f(x) is NOT continuous at x=b, then its Fouries series fails to converge to x=b. So,

(a) Its Fourier series converges to all points in and ...

#### Solution Summary

Convergence of Fourier Series of Periodic Fuctions is investigated. The solution is detailed and well presented.

\$2.49