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3rdtriangularnumber
<-- Enter triangular number statement
Calculate triangular number 3
The formula for triangular number n is as follows
T
_{n}
=
n(n + 1)
2
Given n = 3, we have:
T
_{3}
=
3(3 + 1)
2
T
_{3}
=
3(4)
2
T
_{3}
=
12
2
T
_{3}
=
6
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