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Mathematics
Mathematics
Problem
If in the expansion of
(
2
+
1
3
)
n
(\sqrt{2} + \frac{1}{\sqrt{3}})^n
(
2
+
3
1
)
n
, the ratio of 7th term from the beginning to the 7th term from the end is
1
6
4
\frac{1}{6^4}
6
4
1
, then
n
n
n
is a. 3 b. 5 c. 7 d. 9
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