Question

i needed to edit this

Answer 1

a) Recursive formulas describe the relationship between a term and the previous one in the same sequence. In this case, a1=9 and a2=11 (1 and 2 are the rows).
So an= a(n-1)+2 (difference between 9 and 11 is 2)

b) Explicit formulas allow you to calculate an irrespective of whether you have the previous or latter term or not.

In this case: an= 2n+7 (if you plug 1, you get 2(1)+7 = 9; all you need is the row number and you can get the number of seats using the explicit formula.

c) a(12)= 2(12) + 7
= 31 seats

Answer 2

@G33k do you understand?

Answer 3

yes, thank you :)

Answer 4

Mk, your welcome.