Question

Already tried watching the video it didnt help and some of the tutors didnt know how to do it.

Answer 1

Step-by-step explanation:

A recursive formula is an equation that gives you one term of the sequence taking into account the previous number in the sequence.

In this case, each number is equal to the number before plus 5:

18

23 = 18 + 5

28 = 23 + 5

Therefore, the first term of the sequence is 18, so:

a1 = 18

And the nth term of the sequence can be calculated as the previous term added to 5, so:

`a_n=a_(n-1)+5`