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प्रश्न
If A is 3 × 4 matrix and B is a matrix such that A'B and BA' are both defined. Then, B is of the type
पर्याय
3 × 4
3 × 3
4 × 4
4 × 3
उत्तर
3 × 4
The order of A is 3x 4. So, the order of A' is 4x 3
Now, both
`A’B` and `BA’` are defined. So, the number of columns in A' should be equal to the number of rows in B for A'B.
Also, the number of columns in B should be equal to number of rows in A' for BA'.
Hence, the order of matrix B is 3 X 4
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