answersLogoWhite

0

The formula for the nth triangular number is n(n+1)/2. Therefore, the fourth triangular number is equal to 4 x (4+1) / 2 = (4 x 5) / 2 = 10. The fiftieth triangular number is equal to 50 x (50+1) / 2 = (50 x 51) / 2 = 1275.

User Avatar

Wiki User

15y ago

Still curious? Ask our experts.

Chat with our AI personalities

SteveSteve
Knowledge is a journey, you know? We'll get there.
Chat with Steve
CoachCoach
Success isn't just about winning—it's about vision, patience, and playing the long game.
Chat with Coach
BeauBeau
You're doing better than you think!
Chat with Beau
More answers

The nth triangular number is n(n+1)/2

User Avatar

Wiki User

9y ago
User Avatar

Add your answer:

Earn +20 pts
Q: What is the xth triangular number?
Write your answer...
Submit
Still have questions?
magnify glass
imp