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Determinants

Level 9 / build-up

3x3 triangular (upper)

3 visual steps / triangular diagonal product

1. Diagonal read

1. Diagonal readread 2, 3, 6.241035006read 2, 3, 62 x 3 x 6det = 36
read 2, 3, 6.

read 2, 3, 6.

2. Multiply diagonal

2. Multiply diagonal2 x 3 x 6.241035006read 2, 3, 62 x 3 x 6det = 36
2 x 3 x 6.

2 x 3 x 6.

3. Determinant

3. Determinantdet = 36.DeterminantRead the diagonal product.det = 36.2 x 3 x 6
det = 36.

det = 36.

Practice Level 9

A few quick rounds make the products familiar; the sign is the only thing to guard.

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