Question

$\text{If}\left[\begin{array}{cc}x+2& 0\\ 3& y-1\end{array}\right]=\left[\begin{array}{cc}1& 0\\ 3& 1\end{array}\right],$
$\text{then the value of}(x+y)\text{is equal to :}$


[1 Marks]

• A. 0
• B. 1
• C. 2
• D. 3

Answer 1

The correct option is B 1

Given,
$\left[\begin{array}{cc}x+2& 0\\ 3& y-1\end{array}\right]=\left[\begin{array}{cc}1& 0\\ 3& 1\end{array}\right],$
$\Rightarrow x+2=1\text{and}y-1=1$
$\Rightarrow x=-1\text{and}y=2$

$\Rightarrow x+y=1$