Answer:

Step-by-step explanation:
Given the geometric sequence:
5, −10, 20, −40, ...
The first term is a = 5
And the common ratio = r = -10/5 = -2
The general rule of geometric sequence is

So, the rule for the given geometric sequence is:

Answer:
42
Step-by-step explanation:
Is will be 300 rounded to the nearest 100 :)
if this is some kind of riddle then i think its 5