Best Answer

Choose any number: it is possible to find a polynomial of order 4 such that it forms the rule for the numbers given in the question and your chosen number.

The polynomial

Un = (n3 - 9n2 + 30n - 18)/2 for n = 1, 2, 3, ... fits the given numbers. The next number is 16.

User Avatar

Wiki User

11y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What number comes next in 2 7 9 11?
Write your answer...
Still have questions?
magnify glass