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Mathematics
Mathematics
Problem
If
r
th
r^{\text{th}}
r
th
term of a series is
(
2
r
+
1
)
2
−
r
(2r + 1)2^{-r}
(
2
r
+
1
)
2
−
r
, then sum of its infinite terms is (1) 10 (2) 8 (3) 5 (4) 0
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