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Question

If A=⎡⎢⎣0c−b−c0ab−a0⎤⎥⎦,B=⎡⎢⎣a2abacbab2bccacbc2⎤⎥⎦ then AB=

A
O
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B
I
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C
2I
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D
None of these
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Solution

The correct option is A O
AB=0cbcbaba0a2abacbab2bccacbc2=abcabcb2c1b2cbc2bc2a2c+a2cabc+abcac2+ac2a2ba2bab2ab2abcabc=000000000=0(A)

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