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Standard XI
Mathematics
NCERT
Question
a
n
=
n
(
n
+
2
)
Open in App
Solution
Verified by Toppr
Given,
a
n
=
n
(
n
+
2
)
Substituting
n
=
1
,
2
,
3
,
4
,
5
,
we obtain
a
1
=
1
(
1
+
2
)
=
3
,
a
2
=
2
(
2
+
2
)
=
8
,
a
3
=
3
(
3
+
2
)
=
15
,
a
4
=
4
(
4
+
2
)
=
24
,
a
5
=
5
(
5
+
2
)
=
35.
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