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# Fourier Series watch

1. I need to find the value of the fourier series of f, F, at pi,

when f = 5x (-pi<=x<0) and 9x(0<=x<pi)

I thought it was just 1/2 (the limit aproaching pi from below +the limit approacing pi from above) i.e 0.5(5pi+9pi)=7pi
but this is wrong, any help?
2. I also would have thought it was that. See, for example: http://en.wikipedia.org/wiki/Converg..._a_given_point

Why are you sure it isn't?
3. it's an online problem, so i put in 7pi and it came up as incorrect.

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Updated: February 12, 2010
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