mateforum.ro
MateForum
http://www.mateforum.ro/
O serie dubla
http://www.mateforum.ro/viewtopic.php?t=710
Page
1
of
1
O serie dubla
Posted:
Sun Dec 09, 2007 8:16 pm
by
Vlad Matei
Determinati
\( \displaystyle \sum_{i=1}^{\infty}\sum_{j=1}^{\infty} \frac{1}{2^{i}3^{j}(i+j)} \)
.