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Mathematics
Problem
Explain, in at most two sentences, why the series
∑
n
=
1
∞
3
n
2
n
+
3
n
\displaystyle\sum_{n=1}^{\infty} \frac{3^{\,n}}{2^{\,n}+3^{\,n}}
n
=
1
∑
∞
2
n
+
3
n
3
n
converges or diverges.
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