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Question

lf A=⎡⎢⎣121342132⎤⎥⎦ and B=⎡⎢⎣10−4−1−11509−51⎤⎥⎦ then

A
AB=BA
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B
AB=AB
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C
AB=2BA
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D
AB=3BA
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Solution

The correct option is A AB=BA
Given, A=121342132,B=10411150951
AB=12134213210411150951
=310421511
BA=10411150951121342132
=310421511
Hence, AB=BA

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