alleryA=[[1,2],[0,1]], B=[[2,0],[1,3]]. What are the top-left entries of AB and BA?
A2 and 4
B2 and 2
C4 and 2
D4 and 4
Answer & Solution
Correct answer: C. 4 and 2
The top-left entries are 1×2+2×1=4 for AB and 2×1+0×0=2 for BA.
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