Question

Write the recursive formula for 5, 15, 30, 50...........

Answer 1

A recursive sequence is a sequence in which terms are defined using one or more previous terms that are given.

If you know the term n of an arithmetic sequence and you know the common difference, d, you can find the term
`(n + 1)` by tossing the recursive formula to
`n + 1 = a \ n + d`

We have then:

`5, 15, 30, 50`

`an = ((5)/(2) ) * (n) * (n + 1)`

Answer:

the recursive formula for 5, 15, 30, 50, is:

an = (5/2) x (n) x (n + 1)