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10thtriangularnumber
<-- Enter triangular number statement
Calculate triangular number 10
The formula for triangular number n is as follows
T
n
=
n(n + 1)
2
Given n = 10, we have:
T
10
=
10(10 + 1)
2
T
10
=
10(11)
2
T
10
=
110
2
T
10
=
55
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