Q.

A and B be 3 x 3 matrices. Then, AB = O implies

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a

A=0 and B=0

b

A=0and B=0

c

A=0 or B=0

d

A=0 or B=0

answer is C.

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Detailed Solution

AB=0⇒AB=0⇒A=0 or B=0
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