Question

What is the explicit rule for this geometric sequence?



2, 6, 18, 54, …



an=3⋅2^n

an=2⋅3^n

an=2⋅3^n−1

an=3⋅2^n−1

Answer 1

2.3=6
6.3=18
18.3=54
.
.
.
r(q)=3
--------------------------
an=a1q^n-1
an=2.3^n-1