. Natalka: Odwrócenie macierzy, do sprawdzenia A = 1 2 −1 0 1 2| 1 2 −1 0|−1 0 detA = −2+1−2 −(0−2+0)=−3+2= −1 D₁1 = (−1)² * |0| = 0 D₁2 = (−1)³ * (−1) = 1 D₂1 = −2 D₂2 = 1 A⁻¹ = (−1) [0 1]T = [0 2] [−2 1] [−1 −1] undefined