Given:
The geometric sequence is:

1 -4
2 20
3 -100
To find:
The explicit formula and list any restrictions to the domain.
Solution:
The explicit formula of a geometric sequence is:
...(i)
Where, a is the first term, r is the common ratio and
.
In the given sequence the first term is -4 and the second term is 20, so the common ratio is:



Putting
in (i), we get
where 
Therefore, the correct option is B.
Answer:
The answer would have to be 16.6666666666667. This can be rounded up or keep the same.
Answer:
There is not enough info to draw valid conclusion
Step-by-step explanation:
Hope this helps
Answer:
2xm
Step-by-step explanation: