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Question

If A=123507625 and B=[135002], then which of the following is defined?

A
A+B
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B
AB
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C
AB
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D
BA
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Solution

The correct option is B AB
Given, order of A=3×3
Order of B=2×3
So, AB is not defined.
A±B is not defined.
Order of B=3×2
Order of A=3×3
So, AB is defined.
Hence, the answer is AB.


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