Question

"What is element a23 in matrix A

"

Answer 1

Answer: The answer is (A) -5.

Step-by-step explanation: We are given to find the element
`a_(23)` in the following matrix:

`A=\begin{bmatrix}8 & -4 & -3\\ 3 & -9 & -5\\ -8 & 8 & 8\end{bmatrix}`

We know that
`a_(mn)` is an element of a matrix present in the m-th row and n-th column.

So,
`a_(23)` will be the element present in the second row and third column.

Since the element in the second row and third column is - 5, so we have

`a_(23)=-5.`

Thus, (A) -5 is the correct option.