Question

Which of the following is the result of the operation below?

Answer 1

A

Explanation:

edge 2021

Answer 2

The result of the operation is:

`\left[\begin{array}ccc1&2&3&6\\0&-1&-2&-8\\0&2&1&5\end{array}\right]`

Explanation:

The matrix provided is:

`\left[\begin{array}ccc1&2&3&6\\1&1&1&-2\\0&2&1&5\end{array}\right]`

The operation to be performed is:

`-R_(1)+R_(2)` →
`R_(2)`

The operation implies that, we need to replace the values in row 2 by the result of the expression (
`-R_(1)+R_(2)`).

Complete the operation as follows:

`\rightarrow\ \left[\begin{array}ccc1&2&3&6\\0&-1&-2&-8\\0&2&1&5\end{array}\right]`

Thus, the result of the operation is:

`\left[\begin{array}ccc1&2&3&6\\0&-1&-2&-8\\0&2&1&5\end{array}\right]`