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Earn +20 ptsQ: How do you check which triangular number a given number is?
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What is the 81st triangle number?
The 81st triangular number is 3321 The nth triangular number is given by tn = n(n+1) ÷ 2 The 81st triangular number is: t81 = 81(81+1) ÷ 2 = 3321
What is the fourteenth triangular number?
The nth triangular number is given by: Tn = n(n + 1)/2 → T{14} = 14(14 + 1)/2 = 105
How do you do triangle numbers?
The nth triangular number is n*(n+1)/2 for n = 1, 2, 3, ...In order to figure out if a given number, K, is triangular or not, you need to be able to solve the quadraticn2 + n - 2k = 0If the solution is a positive integer then the number is a triangular number.
Is 63 a Triangular Number?
Is 63 a triangular number I think it is a triangular number.
What is a number that is a triangular number and a triangular number?
013
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