I have a final tomorrow and it includes multiplying matrices (getting a table of values) but i do not understand how he is getting some of the numbers
something like this
suppose the matrices are
A3X4 B4X5 C5x7 D7X2
in the results table he has
A B C D
A 0 60 165 134
B 0 140 110
C 0 70
D 0
A B C D
A A A*B A*B*C A*B*C*D
B B B*C B*C*D
C C C*D
D D
How is he getting 165 unders C for example? I know how he is getting the twi dimentional ones like for instance the 140 under C would be B*C which is 4X5X7 = 140 but I have no idea how he is getting for the A*B*C = 165
Thank you