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