The sequence shown below is defined using a recursion formula

Question

The sequence shown below is defined using a recursion formula. Write the first four terms of the sequence.

a1=12 and an=an-1+1 for n less than or equal to two.

Answer 1

a1 = 12

a2 = 12+1 =13

a3 = 13+1 =14

a4= 14+1 = 15

12,13,14,15 ....

but you said for n less than or = 2

to get 4 terms, you'd have to include a0 and a(-1) or

a(-1) = 10

a0 = 11

a1= 12

a2 = 13

10,11,12, 13