推 yueayase :有些好像不是給人算的,60(a):是false 03/03 19:18
→ yueayase :因為如果恰有兩組解,則Ax1 = Ax2=b => A(x1-x2)=0 03/03 19:19
→ yueayase :則要嘛x1=x2(矛盾),所以只好有無窮組了 03/03 19:20
→ yueayase :(b)應該是對的,這好像是定義 03/03 19:20
→ yueayase :(c)應該也有可能會有某個方程式,可用其他兩個表示 03/03 19:21
→ yueayase :不見得會無解 03/03 19:21
→ yueayase :白癡一點的例子: 03/03 19:22
→ yueayase :x1+x2 = 5 03/03 19:22
→ yueayase :x1-x2 = 3 03/03 19:22
→ yueayase :2x1+2x2=10 03/03 19:22
→ yueayase :好像太爛了XD 03/03 19:22
→ yueayase :其它的應該可以靠加減消去法吧 03/03 19:23