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If A=[(1,1,0),(2,1,5),(1,2,1)] then a(11...

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

A

1

B

0

C

`-1`

D

2

Text Solution

Verified by Experts

The correct Answer is:
B
Given `A=[{:(,1,1,0),(,2,1,5),(,1,2,1):}]` ltBRgt We know that, the sum of product of element other than the corresponding cofactor is zero.
`therefore a_(11)A_(21)+a_(12)A_(22)+a_(13)A_(23)=0`
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