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Find Determinant Formula (3x3) (Level 1)

This math topic focuses on practicing the calculation of the determinant for 3x3 matrices. Specifically, students learn to expand along the first row using the formula for the determinant. Each problem involves choosing the correct application of this formula to specific matrices. The problems serve as a component of a broader unit on matrices, aimed at improving students' skills in matrix algebra, specifically in calculating determinants of 3x3 matrices.

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Find Determinant Formula (3x3)

Complete these online problems with 80% or 4 correct answers in a row. Results are immediate.

Choose the correct formula for the determinant of this matrix based on expanding the first row

∣P∣=a11⋅∣M11∣−a12⋅∣M12∣+a13⋅∣M13∣P=[726674124]\begin{vmatrix}P\end{vmatrix} = a_{11} \cdot \begin{vmatrix}M_{11}\end{vmatrix} - a_{12} \cdot \begin{vmatrix}M_{12}\end{vmatrix} + a_{13} \cdot \begin{vmatrix}M_{13}\end{vmatrix} \\P = \left[ {\begin{array} {ccc} 7 & 2 & 6 \\ 6 & 7 & 4 \\ 1 & 2 & 4 \end{array} } \right]

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