So i kinda have the same problem in these 2 problems.
First one is:
In whiich i have to find the values of A and B members.
And the second one is:
In which 3 of the members have the value of 0, 3 of 1 , 2 of 2 and 1 of 3.
In both of those i am having trouble in defining the matrices and using those matrices to find solutions.
Any help is welcome.
As with the ideas for the second problem from Werner, Yon can use the symbolic engine to provide some help with understanding the matrix multiplication:
But in this case a solve block will produce an answer:
Note that I have included conditions for all the zero elements in the arrays.
If these are omitted the result could include non-zero elements here.
There are also 4 highlighted equations (currently disabled).
Your initial information has 10 unknowns, but the matrix equality only provides a maximum of 16 equations - so this is only 1 of many solutions.
Adding / changing these 4 equations or the initial guess values will give alternate answers to the problem.
You changed the definition of matrix B.
With the original definition we get a pretty integer result:
BTW, with your changed information you have 20 unknowns and only 16 equations.
The original task has 16 unknown and 16 equations.