First row is 3 cookies for every $1, proportional, and Table to the right Second row is 3 more cookies than donuts, non-proportional, and the Table on the left
Assuming convergence of the sequence, we have for some limit as . This also means . So in the above equation, we can substitute and solve for :
The limit can only be one of these values; otherwise, the sequence would be divergent. To decide which one is correct, we can observe that the sequence is strictly positive. So .