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Question

Let,
A=⎡⎢⎣46−13021−25⎤⎥⎦, B=⎡⎢⎣2401−12⎤⎥⎦
and C=[123]
The expression which is not defined is:

A
BB
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B
CAB
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C
A+B
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D
A2+A
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Solution

The correct option is C A+B
We can see from the options that if we take transpose of B,
B will be of 2 x 3 matrix which cannot be added to a 3 x 3 matrix, as for the addition the order should be the same.

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