Class 12Mathematics3-4. Matrices and DeterminantsExpansion of determinants, Solution of equation in the form of determinants and area of triangle and Equation of Line
EasyIf $A \neq O$ and $B \neq O$ are $n \times n$ matrices such that $AB = O$,then
- A$Det(A) = 0$ or $Det(B) = 0$
- B$Det(A) = 0$ and $Det(B) = 0$
- C$Det(A) = Det(B) \neq 0$
- D$A^{-1} = B^{-1}$
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MediumWBJEE 2017
View SolutionIf $\left|\begin{array}{ccc}2 & 2k & 1 \\ 1 & k-1 & 1 \\ 2 & 1 & k+1\end{array}\right|=Ak^2+Bk+C$, then $A+B+C=$
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