Answer:
There is a common ratio of 1/4.
The next 3 numbers are -80, -20 , -5.
Step-by-step explanation:
The next term is found by multiplying by 1/4. ( -5120 / 20480 = 1/4).
So the next 3 terms are -320 * 1/4 = -80,
-80 * 1/4 = -20 and the last is -5.