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JEEMAIN and NEET
>>
Mathematics
>>
Class11
>>
Sequence and Series
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Q)
Sum of series
(
n
)
(
n
)
+
(
n
−
1
)
(
n
+
1
)
+
(
n
−
2
)
(
n
+
2
)
+....+
1
(
2
n
−
1
)
is
(
a
)
n
3
(
b
)
1
6
n
(
n
+
1
)
(
n
+
2
)
(
c
)
1
3
n
3
−
n
2
(
d
)
N
o
n
e
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