What are the next three terms in the sequence? -3,6,15,24

2 answers

6 - ( - 3 ) = 9

15 - 6 = 9

24 - 15 = 9

33 - 24 = 9

42 - 33 = 9

51 - 42 = 9

- 3 ,6 ,15 , 24 , 33 , 42 , 51

Arithmetic progression.

Initial term a1 = - 3

Common difference d = 9
Just count, -3 to 6 is 9, 6 to 15 is 9, 15 to 24 is 9
Common Difference is 9