Respuesta :

09ia01

Answer:

it is going up in odd numbers 3n +1

Explanation:

4 - 7 = 3

7 - 12 = 5

12 - 19 = 7

Answer:

4 - 7 = 3

7 - 12 = 5

12 - 19 = 7

Explanation:

its an odd number