Find
∑
n
=
1
∞
(
4
n
(
n
+
2
)
)
\displaystyle {\sum_{{{n}={1}}}^{\infty}}{\left(\frac{{4}}{{{n}{\left({n}+{2}\right)}}}\right)}
n
=
1
∑
∞
(
n
(
n
+
2
)
4
)
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\displaystyle
Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity