Question

Use the following recursive formula to answer the question.

a1=−32
an=an−1+12

What is a9?

Answer 1

3/9 = 3 ..........

please mark as branlist.

Explanation:

Answer 2

`a_9=64`

Explanation:

So we've been given a recursive formula, this means that each
`a_n` value depends on the value of
`a_(n-1)`

`a_1=-32`

`a_n=a_(n-1)+12`

So, in order to find
`a_9`, we must first find
`a_2, a_3.a_4, a_5, a_6, a_7` and
`a_8`

`a_2=a_1+12=-32+12=-20`

`a_3=a_2+12=-20+12=-8`

`a_4=a_3+12=-8+12=4`

`a_5=a_4+12=4+12=16`

`a_6=a_5+12=16+12=28`

`a_7=a_6+12=28+12=40`

`a_8=a_7+12=40+12=52`

`a_9=a_8+12=52+12=64`

Then,
`a_9=64`