Problem

fR R, $f\left(x\right)=x^{2},-\pi \leq x\leq \pi $ and
$\left(x+2\pi \right)=f\left(x\right)$ VrER. Ifthe fourier series
of f(x) is represented as S $x\right)=\sum $ a, cos nx,
then a

10th-13th grade

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Search count: 107

Solution

Qanda teacher - pankajjee

is it clear dear ??

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$R→Bf\left(x\right)=x^{2}$ $,-\pi \leq x\leq \pi $ and
$f\left(x+2\pi \right)=f\left(x\right),yx∈R$ Ifthe fourier series
$of\left(x\right)$ is represented $2sf\left(x\right)=\sum ^{\infty }a.$ $cosnx$
$bcaab=$ $-$

10th-13th grade

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Search count: 107