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 5 cells.
After 3 days, there are 14 cells.
After 4 days, there are 30 cells.
Which recursive equation represents the pattern?
an = an – 1 + n
an = an – 1 + n2
an = an – 1 + 2n
an = an – 1 + n3

Someone help me out please!!!!!

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 5 cells.
After 3 days, there are 14 cells.
After 4 days, there are 30 cells.
Which recursive equation represents the pattern? 
an = an – 1 + n
an = an – 1 + n2
an = an – 1 + 2n
an = an – 1 + n3 

Someone help me out please!!!!!

anonymous · Answer

you should look at the difference between steps (4, 9 and 16) then compare it to steps (2, 3 and 4)

anonymous · Answer

Honestly I'm not dumb but i do not  understand this question at all! what do you mean by comparing them?

anonymous · Answer

oh wait i think i got it is it So an = asub(n-1) +n^2

anonymous · Answer

exactly!

anonymous · Answer

thanks=D