Question

If $A=\left[\begin{array}{cc}1& 2\end{array}\right],B=\left[\begin{array}{cc}3& 4\end{array}\right]$ then $A+B=$

• A. $\left[\begin{array}{cc}1& 4\end{array}\right]$
• B. $\left[\begin{array}{cc}4& 4\end{array}\right]$
  
• C. $\left[\begin{array}{cc}4& 6\end{array}\right]$
  
• D. None of these

Answer 1

The correct option is C $\left[\begin{array}{cc}4& 6\end{array}\right]$

Given $A=\left[\begin{array}{cc}1& 2\end{array}\right]$

$B=\left[\begin{array}{cc}3& 4\end{array}\right]$

Now, $A+B=\left[\begin{array}{cc}1+3& 2+4\end{array}\right]$

$\Rightarrow A+B=\left[\begin{array}{cc}4& 6\end{array}\right]$

$\therefore$Option C is correct