Which of the following matrices is not a square-matrix?

1. [1]
2. $\left[\begin{array}{ll}2 & 2 \\ 2 & 2\end{array}\right]$
3. $\left[\begin{array}{lll}3 & 3 & 3\end{array}\right]$
4. $\left[\begin{array}{lll}1 & 1 & 1 \\ 1 & 1 & 1 \\ 1 & 1 & 1\end{array}\right]$

Solution

Asked in: AP EAMCET 2021 (24 Aug Shift 2)

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