Compute $\sum_{k \in \mathbb{Z}}\left|\int_{0}^{1} x^{2} e^{i k x} d x\right|^{2}$
Do you have better solution for this problem without explicit compute this integral?
$\frac{e^{i k} ((1+i)-i k \log (e)) (k \log (e)+(1+i))-2 i}{k^3 \log ^3(e)} $
Compute $\sum_{k \in \mathbb{Z}}\left|\int_{0}^{1} x^{2} e^{i k x} d x\right|^{2}$
Do you have better solution for this problem without explicit compute this integral?
$\frac{e^{i k} ((1+i)-i k \log (e)) (k \log (e)+(1+i))-2 i}{k^3 \log ^3(e)} $
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