11 results.
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Question in Julia Goedecke's contributions
Educational calculation tool rather than "question".
This allows the student to input a square matrix (max rows 5). Then the student can decide to swap some rows, or multiply some rows, or add multiples of one row to other rows. The student only has to input what operation should be performed, and this is automatically applied to the matrix and the identity matrix (or what it has got to). This question has no marks and no feedback as it's just meant as a "calculator". It has some checks in so students know when they are not entering a square matrix or a valid row number etc.
It has some rounding to 13 decimal places, as otherwise some fraction calculations become incorrectly displayed as a very small number instead of 0.
It would be possible to extend to more than 5 rows, one just has to put in a lot more variables and so on. I just had to choose some place to stop.
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Question in Hayley's workspace
Find the inverse of three 2×2 invertible matrices.
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Question in Hayley's workspace
Find the determinant of three 2×2 invertible matrices.
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Question in Content created by Newcastle University
Find the determinant and inverse of three 2×2 invertible matrices.
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Question in Content created by Newcastle University
A a 3×3 matrix. Using row operations on the augmented matrix (A|I3) reduce to (I3|A−1).
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Question in Christian's workspace
A a 3×3 matrix. Using row operations on the augmented matrix (A|I3) reduce to (I3|A−1).
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Question in Christian's workspace
Find the determinant and inverse of three 2×2 invertible matrices.
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Question in Ricardo's workspace
A a 3×3 matrix. Using row operations on the augmented matrix (A|I3) reduce to (I3|A−1).
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Question in Habiba's workspace
A a 3×3 matrix. Using row operations on the augmented matrix (A|I3) reduce to (I3|A−1).
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Question in Michael's workspace
Find the determinant and inverse of three 2×2 invertible matrices.
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Question in Christoph's workspace
Find the determinant and inverse of three 2×2 invertible matrices.