The cofactor Aij equals the minor multiplied by:
AThe order of n
BMinus one power
CTwo to the ij
DThe element aij
Answer & Solution
Correct answer: B. Minus one power
1. A cofactor is a signed minor.
2. The sign alternates with position.
3. It is minus one to the power i plus j, times the minor.
4. So the answer is minus one power.
_Source: syllabus Mathematics, Ch 4 'Determinants'_
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