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7thnonagonalnumber
<-- Enter nonagonal number statement
Calculate nonagonal number 7
The formula for nonagonal number n is as follows
N
n
=
n(7n - 5)
2
Given n = 7, we have:
N
7
=
7(7(7) - 5)
2
N
7
=
7(49 - 5)
2
N
7
=
7(44)
2
N
7
=
308
2
N
7
=
154
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