Write 80 as a product of prime factors

Asequence {an} is defined recursively, with a1 = 1, a2 = 2 and, for n > 2, an = an-1 an-2 . find the term a241. a) 0 b) 1 c) 2 d) 1 2

Describe a situation that you could represent with the inequality x< 17

Use sigma notation to represent the following series for 9 terms.