作者cmkv7rdf (Why so serious?)
看板Grad-ProbAsk
标题[理工] 矩阵 证明
时间Thu Sep 24 19:22:16 2009
1.let S ={(x1,x2,x3)′│x1=x2} . Show that S is a subspace of R^3.
2.prove the following rules for matrix multiplication:
(a) (AB)C=A(BC)
(b) A(B+C)=AB+AC
(c) (AB) = B A
3.let A=│ a11 a12 │ ,show that if d=a11a22-a21a12≠0,
│ a21 a22 │
Then A^-1= 1/d │ a22 -a12 │
│ -a21 a11 │
回答出来一题给100P
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1F：推 saixpzooo:ex2 problem 用 trace 你把矩阵写成sum AijxBji 09/24 19:33
2F：→ saixpzooo:problem 3 09/24 19:33
3F：→ saixpzooo:反转 sum 连代反转 ij 09/24 19:34
4F：→ yesa315:1. 证明纯量积与向量加法的封闭性 且包含0向量 09/24 19:36
5F：→ yesa315:3的d是...? 09/24 19:38