Determinants

Bihar Board Class 12 · Mathematics · 70 past questions

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1. Q28 2025 Set E

   Prove that $\begin{vmatrix} 23 & 12 & 11 \\ 36 & 10 & 26 \\ 63 & 26 & 37 \end{vmatrix} = 0$.

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2. Q31 2025 Set E

   Prove that $\begin{vmatrix} a+b & b & c \\ b+c & c & a \\ c+a & a & b \end{vmatrix}=3abc-a^3-b^3-c^3$.

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