If A = [[2,3],[4,5]] and B = [[1,0],[0,1]], then AB equals:
A[[1,0],[0,1]]
B[[2,3],[4,5]]
C[[0,0],[0,0]]
D[[3,3],[4,6]]
Answer & Solution
Correct answer: B. [[2,3],[4,5]]
B is the 2 × 2 identity, so AB = A.
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