Question

Use the following recursive formula to answer the question.

a1=−32
an=an−1+12

What is a9?

Answer 1

Answer:

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

please mark as branlist.

Step-by-step explanation:

Answer 2

Answer:

$a_9=64$

Step-by-step 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, $a_9=64$