Plot the first five terms of the sequence:
2
+
(
−
1
)
n
n
\displaystyle {2}+{\left(-{1}\right)}^{{n}}{n}
2
+
(
−
1
)
n
n
1
2
3
4
5
-1
1
2
3
4
5
6
7
8
9
10
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
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