Question

A rare bacterial culture is being grown in a lab. As the days progress, the cells multiply and grow.

After 1 day, there is only 1 cell.
After 2 days, there are 8 cells.
After 3 days, there are 18 cells.
After 4 days, there 31 cells.

Which recursive equation represents the pattern?

A. an=an-1+3n+1 <- my answer
B. an=an-1+3(n+1)
C. an=an-1+(n+3)
D. an=an-1+(n-3)

@mathmale

Answer 1

@mathmale

Answer 2

@hero

Answer 3

D doesn't make sense to me.

Answer 4

@mathmale