Question
If $\text{A}=\displaystyle \begin{vmatrix} 1 &\text{amp; } 0 \\ 1 &\text{amp; } 0 \end{vmatrix}$ And $\text{B}=\displaystyle \begin{vmatrix} 1 &\text{amp; } 0 \\ 0 &\text{amp; } 1 \end{vmatrix}$ then $\text{A+B}=$
  1. $\text{A}$
  2. $\text{B}$
  3. $\displaystyle \begin{vmatrix}2&0 \\ 1 &1 \end{vmatrix}$
  4. $\displaystyle \begin{vmatrix}0&2 \\ 2 &2 \end{vmatrix}$

Answer

  1. $\displaystyle \begin{vmatrix}2&0 \\ 1 &1 \end{vmatrix}$

Solution:

$\text{A+B}=\displaystyle \begin{vmatrix} 2 &\text{amp; } 0 \\ 1 &\text{amp; } 1 \end{vmatrix}$

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