Respuesta :

Answer:

1. 1, 2, 4

2. 1, 3, 9

3. 1, 2, 4, 5, 10, 20

Step-by-step explanation:

Answer:

1. 8,12,16,20,24, etc , 2 . 18,27,36,45, etc, 3. 40,60,80,100,120,140 etc

Step-by-step explanation: