alleryFor matrix multiplication AB to be defined:
ABoth must be square
BA and B must be same size
CNumber of columns of A must equal number of rows of B
DBoth must be 2×2
Answer & Solution
Correct answer: C. Number of columns of A must equal number of rows of B
AB defined when columns of A = rows of B. If A is m×p and B is p×n, then AB is m×n. Otherwise undefined.
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