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Question
If A is a 2 × 3 matrix such that AB and AB' both are defined, then the order of the matrix B is ______.
Options
2 × 2
2 × 1
3 × 2
3 × 3
Solution
If A is a 2 × 3 matrix such that AB and AB' both are defined, then the order of the matrix B is 3 × 3.
Explanation:
Here, matrix A is of order 2 × 3. And AB and AB' are both defined. Then, from the given options order of matrix B is 3 × 3.
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