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If \(A=\begin{bmatrix}1&2&3\\4&5&6\end{bmatrix}\), which is the second row?

Answer and explanation

Correct answer: (4,5,6)

Rows of a matrix are the horizontal lists of entries. For this 2×3 matrix the first row is (1,2,3) and the second (bottom) row is (4,5,6). Option A is the first row; options C and D are columns (first and third column respectively). Exam tip: use the row index (the first index) to identify which horizontal list is the required row.

Related tags

MatricesRowsLinear-AlgebraIdentificationMatrix-ElementsIntroduction To MatricesMatrixMathematics

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