LINEAR ALGEBRA (Part-4) - Identity and Inverse Matrices
LINEAR ALGEBRA (Part-4) Identity and Inverse Matrices Identity Matrix It is a square matrix that do not change any matrix or vector when multiplied with. Means If a matrix A 2,2 is multiplied by identity matrix I 2,2 then the result will be A 2,2 . So, A 2,2 ❌ I 2,2 = A 2,2 A 2,2 = [ I 2,2 = [ A 2,2 = [ A 2,2 = [ 2 3 ❌ 1 0 = 2❌1 ➕ 3❌0 2❌0 ➕ 3❌1 = 2 3 5 4 0 1 5❌1 ➕ 4❌0 5❌0 ➕ 4❌1 5 4 ] ] ] ] Identity matrix looks like above I 2,2 . Where dia...