In the 1st generation, there are 5 bats in a forest. Every generation after that, the bat population triples. This sequence represents the numbers of bats for
the first few generations:
5, 15, 45, ...
What is the explicit formula for the number of bats in generation n?
A. a(n) = 3 + (n - 115
B. a(n) = 3 - 5(n-1)
C. a(n) = 5+ (n - 1)3
D. a(n) = 5.3(n-1)