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5thnonagonalnumber
<-- Enter nonagonal number statement
Calculate nonagonal number 5
The formula for nonagonal number n is as follows
N
n
=
n(7n - 5)
2
Given n = 5, we have:
N
5
=
5(7(5) - 5)
2
N
5
=
5(35 - 5)
2
N
5
=
5(30)
2
N
5
=
150
2
N
5
=
75
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