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11th Standard English Medium Business Maths Subject Matrices and Determinants Book Back 3 Mark Questions with Solution Part - II

11th Standard

    Reg.No. :
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Business Maths

Time : 00:30:00 Hrs
Total Marks : 15
    5 x 3 = 15
  1. Solve by matrix inversion method: 2x + 3y - 5 = 0, x - 2y + 1 = 0.

  2. Find the inverse of each of the following matrices \(\left[ \begin{matrix} 1 & 2 & 3 \\ 0 & 2 & 4 \\ 0 & 0 & 5 \end{matrix} \right] \)

  3. Find the minor and cofactor of each element of the determinant\(\left| \begin{matrix} 1 & -2 \\ 4 & 3 \end{matrix} \right| \)

  4. Find adj A for \(A=\left[ \begin{matrix} 2 & 3 \\ 1 & 4 \end{matrix} \right] \)

  5. If \(A=\left[ \begin{matrix} 2 & 4 \\ -3 & 2 \end{matrix} \right] \)then, find A -1.

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