answersLogoWhite

0

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 quadratic

n2 + n - 2k = 0

If the solution is a positive integer then the number is a triangular number.

User Avatar

Wiki User

12y ago

Still curious? Ask our experts.

Chat with our AI personalities

TaigaTaiga
Every great hero faces trials, and you—yes, YOU—are no exception!
Chat with Taiga
JudyJudy
Simplicity is my specialty.
Chat with Judy
RafaRafa
There's no fun in playing it safe. Why not try something a little unhinged?
Chat with Rafa

Add your answer:

Earn +20 pts
Q: How do you do triangle numbers?
Write your answer...
Submit
Still have questions?
magnify glass
imp