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Question
If A = `[(2, -1, 3),(-4, 5, 1)]` and B = `[(2, 3),(4, -2),(1, 5)]`, then ______.
Options
Only AB is defined
Only BA is defined
AB and BA both are defined
AB and BA both are not defined.
Solution
If A = `[(2, -1, 3),(-4, 5, 1)]` and B = `[(2, 3),(4, -2),(1, 5)]`, then AB and BA both are defined.
Explanation:
Let A = [aij]2×3 B = [bij]3×2 .
Both AB and BA are defined.
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