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Find the 30th triangular number, which
is TR (30).

User RWIL
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2 Answers

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Explanation:

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Find the 30th triangular number, which is TR (30).-example-1
User Collin Thomas
by
7.9k points
3 votes

Answer:

30th triangular number = 465

Explanation:

the rule for calculating any triangular number is


a_(n) =
(1)/(2) n(n + 1)

so to find the 30th triangular number, substitute n = 30 into the rule

a₃₀ =
(1)/(2) × 30 × (30 + 1) = 15 × 31 = 465

User Jordin Youssef
by
8.0k points

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