Skip to content
Math Lab
Menu
K–12 course
Available practice
SAT practice
Sign in
Admin
grade 9 · A1-009
Write an arithmetic sequence rule
Connect a common difference to explicit and recursive sequence rules.
← Learning map
Learn together
Try with a hint
Show what I know
Learn together
Fresh problem · seed 1445471521
The arithmetic sequence begins 3, 12, 21, 30, 39, …. What is term 9?
3
term 1
+9
12
term 2
+9
21
term 3
+9
30
term 4
+9
39
term 5
Your answer