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of this

yeah i know

the first thing I have to find is the fourier coefficient. I think it is 1/4?

\[1/(2\pi)(\int\limits_{-\pi}^{0}0 dx + \int\limits_{0}^{\pi}(1/\pi)x dx\]

which is 1/4

Yep, that appears correct to me.

\[a _{n}=1/\pi \int\limits_{-\pi}^{0}0 dx + \int\limits_{0}^{\pi}(1/\pi)x dx\]

I am not sure if I am doing it right on the last one

yeah so then it is correct

so then it is 1/pi?

sin (1/pi)

So I am finding:
\( \displaystyle a_n = \frac{\pi n \sin n \pi + \cos \pi n - 1}{\pi^2 n^2} \)

and then I must do a \[b _{n}\]

\[b _{n}=1/\pi(\int\limits_{-\pi}^{0}0dx + \int\limits_{0}^{\pi}(1/\pi)x dx\]

oh it's the same I just forgot to write the nx

and that -cos (pi/pi)

okey. thank you

You're welcome! :)

thank you :)