Respuesta :

Answer:

9,-10,11,-12,13,-14,15,-16,17,-18,19,-20,21,-22,23,-24,25,-26,

27,-28,29,-30

Explanation:

It comes as positive and then as a negative number and continues in the same format.

Hope it helps....

Answer:

Explanation:

9,-10,11,-12,13,-14,15,-16,17,-18,19,-20,21,-22,23,-24,25,-26,

27,-28,29,-30