# Question 1, Exercise 2.1

Solutions of Question 1 of Exercise 2.1 of Unit 02: Matrices and Determinants. This is unit of Model Textbook of Mathematics for Class XI published by National Book Foundation (NBF) as Federal Textbook Board, Islamabad, Pakistan.

Find the order of the following matrix $A=\left[\begin{array}{lll}1 & 3 & 0 \\ 2 & 0 & 1\end{array}\right]$

Solution.

\begin{align}\text{Order of A}&= 2\times 3\end{align}

Find the order of the following matrix $B=\left[\begin{array}{ll}1 & 2 \\ 2 & 3 \\ 3 & 4\end{array}\right]$

Solution.

\begin{align}\text{Order of B}&= 3\times 2\end{align}

Find the order of the following matrix $C=\left[\begin{array}{l}1 \\ 6 \\ 9\end{array}\right]$.

Solution.

\begin{align}\text{Order of C}&= 3\times 1\end{align}

Find the order of the following matrix $D=\left[\begin{array}{llll}2 & 1 & 6 & 8\end{array}\right]$.

Solution.

\begin{align}\text{Order of D}&= 1\times 4\end{align}

Find the order of the following matrix $E=[3]$.

Solution.

\begin{align}\text{Order of E}&= 1\times 1\end{align}

Find the order of the following matrix $F=\left[\begin{array}{ll}3 & 6 \\ 9 & 2\end{array}\right]$.

Solution.

\begin{align}\text{Order of F}&= 2\times 2\end{align}