Question

Hey can u please help me with this , am trying to l study’s but am not getting it

Answer 1

Given:

A product of square matrix A and identity matrix I.

Required:

Which matrix defined the product of square matrix A and identity I.

Step-by-step explanation:

We will do matrix multiplication

`\begin{gathered} \begin{bmatrix}{2} & {1} \\ {3} & {4}\end{bmatrix}\begin{bmatrix}{1} & {0} \\ {0} & {1}\end{bmatrix}=\begin{bmatrix}{2} & {1} \\ {3} & {4}\end{bmatrix} \\ \begin{bmatrix}{2+0} & {0+1} \\ {3+0} & {0+4}\end{bmatrix}=\begin{bmatrix}{2} & {1} \\ {3} & {4}\end{bmatrix} \\ \begin{bmatrix}{2} & {1} \\ {3} & {4}\end{bmatrix}=\begin{bmatrix}{2} & {1} \\ {3} & {4}\end{bmatrix} \end{gathered}`

Answer:

Option A is correct.