Define whether sequence is arithmetic or geometric and write the n-th term formula1) 11,17,23,…2) 5,15,45,…

Litzy Wallace

Litzy Wallace

Answered

2022-03-27

Define whether sequence is arithmetic or geometric and write the n-th term formula
1) 11,17,23,
2) 5,15,45,

Answer & Explanation

aznluck4u72x4

aznluck4u72x4

Expert

2022-03-28Added 16 answers

(1) 11,17,23,
1711=6, 2317=6, thus, r=6 and the sequence is arithmetic
n-th term: a+(n1)d
=11+(n1)6
=11+6n6
=6n+5 (n-th term formula)
(2) 5,15,45,
155=3 and 4515=3, thus, r=3 and the sequence is geometric
n-th term: arn1
=5×3n1 (n-th term formula)

Do you have a similar question?

Recalculate according to your conditions!

Ask your question.
Get your answer.

Let our experts help you. Answer in as fast as 15 minutes.

Didn't find what you were looking for?