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. ( begin{bmatrix}2&5&4 19&19&24 7&2&1 end{bmatrix} )


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