I)Fie A II)Fie (23) si 1. calculati A+B, A-B, 2A+3B, 3A-2B 2. calculati detA, detB si det(AB) A (²3) 4 3. determinati rangul matricelor A, B, si A+B 4. calculati suma elementelor matricei X=A+A²+A³+A+ B = (1 2 3 0 1 2 0 0 1 1. calculati detA si rangA 2. determinati A", VnEN 3. calculati determinantul matricei (A+13)(A-I₂)​