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Sections

Determinants

Pick a section. You read the idea first, then answer questions on it.

1. One number, one big question1 ideaRead

2. Determinant of 1x1 and 2x21 ideaRead

3. Minors, then signed cofactors1 ideaRead

4. Expanding a 3x3 — and the sign that is not optional3 ideasRead

5. Four operations, and how products behave3 ideasRead

6. Area from three vertices2 ideasRead

7. The adjoint, and the inverse it builds3 ideasRead

8. Solving AX=B3 ideasRead

9. One number, the whole chapter1 ideaRead

10. Practice set7 ideasRead