Question

an=12^n-1

Answer 1

so what is the question?

Answer 2

The question is to solve the geometric sequence with the formula an=a1 x r^n-1

Answer 3

first term a1 = 12^(1-1) = 12^0 = 1
a2 = 12^(2-1) = 12
a3 = 12^(3-1) = 12^2 = 144

first 3 terms of the GS are 1,12,144
common ratio r = 12/1 = 12