First slide

Operations of matrix

Question

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

Easy

A

A=0 and B=0
B

$|A| = 0 a n d |B| = 0$
C

$|A| = 0 o r |B| = 0$
D

A=0 or B=0

Solution

$A B = 0 \Rightarrow |A B| = 0 \Rightarrow |A| = 0 o r |B| = 0$

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