Matrices & Determinants · JEE Main previous year questions

2009 1 question

1. Q252009 · 27 Apr 2009 · Shift 1

   Let $A$ be a $2\times 2$ matrix Statement - 1 : $adj(adjA)=A$ Statement - 2 : $|adjA|=|A|$

   1. A.statement - 1 is true, statement - 2 is true; statement - 2 is not a correct explanation for statement - 1.
   2. B.statement - 1 is true, statement - 2 is false.
   3. C.statement - 1 is false, statement - 2 is true
   4. D.statement -1 is true, statement - 2 is true; statement - 2 is a correct explanation for statement - 1.
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   Answer: A