作者rr8r8r8r8tw (amp)
看板Math
标题[线代] 几题线性方程式 题目问题
时间Thu Mar 3 18:57:05 2011
想请问第48、52、54、56、58、60题算法？
http://i754.photobucket.com/albums/xx185/rpd11140/other/IMG_0021.jpg
http://i754.photobucket.com/albums/xx185/rpd11140/other/IMG_0023.jpg
http://i754.photobucket.com/albums/xx185/rpd11140/other/IMG_0024.jpg
http://i754.photobucket.com/albums/xx185/rpd11140/other/IMG_0028.jpg
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1F：推 yueayase :有些好像不是给人算的,60(a):是false 03/03 19:18
2F：→ yueayase :因为如果恰有两组解,则Ax1 = Ax2=b => A(x1-x2)=0 03/03 19:19
3F：→ yueayase :则要嘛x1=x2(矛盾),所以只好有无穷组了 03/03 19:20
4F：→ yueayase :(b)应该是对的,这好像是定义 03/03 19:20
5F：→ yueayase :(c)应该也有可能会有某个方程式,可用其他两个表示 03/03 19:21
6F：→ yueayase :不见得会无解 03/03 19:21
7F：→ yueayase :白痴一点的例子: 03/03 19:22
8F：→ yueayase :x1+x2 = 5 03/03 19:22
9F：→ yueayase :x1-x2 = 3 03/03 19:22
10F：→ yueayase :2x1+2x2=10 03/03 19:22
11F：→ yueayase :好像太烂了XD 03/03 19:22
12F：→ yueayase :其它的应该可以靠加减消去法吧 03/03 19:23