【用戶】陳俊友
【年級】高三下
【評論內容】4. 若 A = [aij]m×n, B = [bij]n×p, C = [cij ]n×p 及零矩陣 O, 則下列敘述何者正確? (A) AB + AC = A(B + C) (B) 若 AB = O, 則 A = O 或 B = O (C) 若 AB = AC 且 detA≠ 0, 則 B = C (D) (AB)2 = A2B2(E) AB = BA
【用戶】【站僕】摩檸Morning
【年級】小一下
【評論內容】原本題目:4. 若 A = [aij ]m×n, B = [bij ]n×p, C = [cij ]n×p 及零矩陣 O, 則下列敘述何者正確?(A) AB + AC = A(B + C)(B) 若 AB = O, 則 A = O 或 B = O(C) 若 AB = AC 且 detA 6= 0, 則 B = C(D) (AB)2 = A2B2(5) AB = BA修改成為4. 若 A = [aij ]m×n, B = [bij ]n×p, C = [cij ]n×p 及零矩陣 O, 則下列敘述何者正確?(A) AB + AC = A(B + C)(B) 若 AB = O, 則 A = O 或 B = O(C) 若 AB = AC 且 detA 6= 0, 則 B = C(D) (AB)2 = A2B2(E) AB = BA...