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Offline trfrm

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question
« pada: Juli 20, 2018, 11:19:15 AM »
Salam sejahtera.

Excuse me ... . I might be wrong ... . But this may mean ... .

$z(t)=e^{2\pi{i}(7t)}f(t)=x(t)+i\,y(t)$.
$f(t)=\cos(6\pi{t})\,e^{-\pi{t^2}}$.
$x(t)=f(t)\cos(2\pi(7t))$.
$y(t)=f(t)\sin(2\pi(7t))$.

http://www.thescienceforum.com/mathematics/33887-question.html#post398101

Alhamdulillah hirobbil alamin.



\[ \sum_{j=0}^\infty \frac{1}{j!(n-j)!} = \frac{2^n}{n!} \]