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8thpentagonalnumber
<-- Enter pentagonal number statement
Calculate pentagonal number 8
The formula for pentagonal number n is as follows
P
n
=
n(3n - 1)
2
Given n = 8, we have:
P
8
=
8(3(8) - 1)
2
P
8
=
8(24 - 1)
2
P
8
=
8(23)
2
P
8
=
184
2
P
8
=
92
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