The matrices W1, W2,Fx1 and Fx2 have been solved. When the basic calculation, dy[2,1]=W1[[2,2]]×Fx1[[2,1]]-W2[[2,2]]×Fx2[[2,1]]+W1[[2,4]]×Fx1[[4,1]]-W2[[2,4]]×Fx2[[4,1]],is done, dy[2,1]output is 0.×10^4. If I apply the "enter" key to the output, the value is as follows: 0.30176021`-5.461955855577274.
Which value is believable? If the second is feasible, how can I get the value for my next calculation, since the dy[2,1] default value is zero. What should I do to avoid the case?
Thanks in advance