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det(cA)
cndet(A)
det(Ak)
det(A)k
det(AB)
det(A)det(B)
det(−A)
(−1)ndet(A)
det(A-1)
1/det(A)
How does row scaling affect determinant directly?
Multiplying one row by c multiplies det(A) by c.
How do row swaps affect determinant?
Swapping two rows multiplies the determinant by −1.
How do row additions affect determinant?
Adding a multiple of one row to another leaves det(A) unchanged.
Shortcut: If a matrix is upper (or lower) triangular, what is its determinant?
The product of its diagonal entries.
Similar matrices (A=PBP⁻¹)
Have the same determinant