answersLogoWhite

0


Best Answer

f(n) = (n² + n) / 2

f(1) = (1² + 1) / 2 = 1

f(2) = (2² + 2) / 2 = 3

f(3) = (3² + 3) / 2 = 6

f(4) = (4² + 4) / 2 = 10

f(5) = (5² + 5) / 2 = 15

f(6) = (6² + 6) / 2 = 21

User Avatar

Wiki User

11y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What is the nth term for 1 3 6 10 15 21?
Write your answer...
Submit
Still have questions?
magnify glass
imp