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For a 2 by 2 matrix with A = 2B, det A is det B times:

ATwoo
BSixx
CNine
DFour
Answer & Solution
Correct answer: D. Four
1. Here k is 2 and the order n is 2. 2. The rule gives k to the power n. 3. That is 2 squared, which is 4. 4. So the answer is four. _Source: syllabus Mathematics, Ch 4 'Determinants'_
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