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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 toA. 1B. 0C. `-1`D. 2 |
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Answer» Correct Answer - 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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