134k views
2 votes
Write a recursive formula for the sequence

Write a recursive formula for the sequence-example-1

1 Answer

2 votes

Answer:

Option B: a1= 15 ,
a_n = 2a_(n-1)- 4

Explanation:

Given sequence is 15, 26, 48, 92, 180..........

First term is a1, so a1= 15

To get second term 26, we multiply the first term with 2

So it becomes 15*2 = 30

Then we subtract 4 from 30. so 30-4=26

To get third term 48,

previous term 26 *2 - 4= 52-4=48

a_n is the first term and a_(n-1) is the previous term

To get recursive formula

multiply the previous term by 2 and then subtract 4

So recursive formula becomes


a_n = 2a_(n-1)- 4

Option B is correct



User Cristianoms
by
7.9k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories