Respuesta :
Answer:
6
Step-by-step explanation:
21 is the first term
2 is the second term
3 is the third term
-15 is the fourth term
2 is the fifth term
9 is the sixth term
Answer:
6
Step-by-step explanation:
21 is the first term
2 is the second term
3 is the third term
-15 is the fourth term
2 is the fifth term
9 is the sixth term