Answer:
a)
b)
c)
Step-by-step explanation:
a) Geometric sequence with first term 5 and common ratio 2, where the nth term can be calculated via:
The first five terms are:
b) Geometric sequence with first term 100 and common ratio 1/2, where the nth term can be calculated via:
The first five terms are:
c) Geometric sequence with first term 160 and common ratio -1/2, where the nth term can be calculated via:
The first five terms are: