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2ndnonagonalnumber
<-- Enter nonagonal number statement
Calculate nonagonal number 2
The formula for nonagonal number n is as follows
N
n
=
n(7n - 5)
2
Given n = 2, we have:
N
2
=
2(7(2) - 5)
2
N
2
=
2(14 - 5)
2
N
2
=
2(9)
2
N
2
=
18
2
N
2
=
9
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