Menu
Start Here
Our Story
Hire a Tutor
Upgrade to Math Mastery
9thheptagonalnumber
<-- Enter heptagonal number statement
Calculate heptagonal number 9
The formula for heptagonal number n is as follows
H
n
=
n(5n - 3)
2
Given n = 9, we have:
H
9
=
9(5(9) - 3)
2
H
9
=
9(45 - 3)
2
H
9
=
9(42)
2
H
9
=
378
2
H
9
=
189
Run Another Calculation