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1. |
The new matrix after applying the elementary operation R2→2R2+3R1 on the matrix A=\(\begin{bmatrix}2&5&4\\5&2&6\\7&2&1\end{bmatrix}\) is _____________ |
A. | \(\begin{bmatrix}2&5&4\\16&19&24\\7&2&1\end{bmatrix}\) |
B. | \(\begin{bmatrix}2&5&4\\19&19&24\\7&2&1\end{bmatrix}\) |
C. | \(\begin{bmatrix}2&-5&4\\16&19&24\\7&2&1\end{bmatrix}\) |
D. | \(\begin{bmatrix}1&5&4\\16&19&24\\7&2&1\end{bmatrix}\) |
Answer» B. | |