Question

Which one of the following matrices does not have an inverse

• A. $\left[\begin{array}{cc}1& 0\\ 2& 2\end{array}\right]$
• B. $\left[\begin{array}{cc}2& 1\\ 1& 2\end{array}\right]$
• C. $\left[\begin{array}{cc}1& 2\\ 2& 1\end{array}\right]$
• D. $\left[\begin{array}{cc}1& 1\\ 2& 2\end{array}\right]$

Answer 1

Answer: (D)

Correct answer is (d) $\left[\begin{array}{cc}1& 1\\ 2& 2\end{array}\right]$