13 2dA 2D animation software based on bitmap technology. Intuitive and easy to use, it gives professional animators all the necessary tools to give life to theirOn putting A=0 and B=13, we can get 13. On putting D=0 and B=13 in eqn (2), we can still get 13. Thus, we can say that the value of D cannot be determed from the given data.