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What is the value of \(a_{22}\) in the matrix \(A=\begin{bmatrix}9&8\\7&6\end{bmatrix}\)?

Answer and explanation

Correct answer: 6

\(a_{ij}\) denotes the element in the i-th row and j-th column. Thus \(a_{22}\) is the element in the second row and second column. In matrix \(A\) that entry is \(6\). The other choices correspond to \(9=a_{11},\ 8=a_{12},\ 7=a_{21}\). Exam tip: Always read \(a_{ij}\) as row i, column j to locate the element quickly.

Related tags

MatricesElement-PositionBasicIndices2X2Introduction To MatricesMatrixMathematics

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