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Questions  >>  CBSE XII  >>  Math  >>  Model Papers
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Using properties of determinants, prove the following: $ \begin{bmatrix} a^2+1 \quad & ab \quad & ac \\ ab \quad & b^2+1 \quad & bc \\ ca \quad & cb \quad & c^2+1 \end{bmatrix} = 1+a^2+b^2+c^2. $

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