4 in
161 in
24 in
Answer:
Arithmetic sequence.
Step-by-step explanation:
We have been given 9,5,1 and -3
We need to check what kind of sequence is this.
d is common difference we will check difference of consecutive terms.
We can see the difference between all the terms are same that is -4
So, this is an arithmetic sequence.
Arithmetic sequence is the sequence in which the difference between consecutive terms are same.
B) 9(n − 9)
C) n − 9 + 8n
D) 9n − 9