Inverse Matrix
AB = BA = I · The 2 × 2 formula · Properties
Tell when two matrices are inverses
Find the inverse of a 2 × 2 matrix
Find unknown entries using AB = I
Use and check the properties of the inverse
5 × 1/5 = 1 for numbers
I = [1 0; 0 1] plays the role of 1
If AB = BA = I, then B = A⁻¹ and A = B⁻¹
🔐
The notes are free to read in full.
Create free account Sign in