Answer:
Geometric sequence.
Step-by-step explanation:
This is a Geometric Sequence with common ratio -2:
-2 = 1* -2
4 = -2*-2
-8 = 2 * -2.
the nth term = (-2)^(n-1).
Answer:

Step-by-step explanation:
N/A
Answer:
b
Step-by-step explanation:
edge 2021 -2020
11! = 39,916,800
The erased digits are 1, 0, 0.