A colony has 1 rabbit,A rabbit produces one offspring everymonth.An offspring rabbit takes one month to grow up.Find a formula for the number of rabbits (including offspring) in the month.How about if...

A colony has 1 rabbit,A rabbit produces one offspring everymonth.An offspring rabbit takes one month to grow up.Find a formula for the number of rabbits (including offspring) in the month.How about if the colony starts with a rabbits and b offspring?