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IF A=[(1,1,0),(2,1,5),(1,2,1)],then a(...

IF ` A=[(1,1,0),(2,1,5),(1,2,1)],`then `a_(11) A_(21) +a_(12)+a_(12)A_(22)+a_(13)A_(23)` =

A

1

B

0

C

`-1`

D

2

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B
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