here is the question
http://www2.hkedcity.net/sch_files/a/kst/kst-06185/public_html/tr1.jpg
http://www2.hkedcity.net/sch_files/a/kst/kst-06185/public_html/tr2.jpg
here is the suggested solution.
http://www2.hkedcity.net/sch_files/a/kst/kst-06185/public_html/tr.jpg
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i only want to ask part c.
i don't know the forth equal sign.
from aii,tr(AB)=tr(BA),only involve 2 matrix, but there are 3 matrix in the sol.
am i miss something?
past paper,pure,matrix again
2008-02-17 12:27 am
回答 (1)
2008-02-17 12:49 am
✔ 最佳答案
Yes the forth equal sign is come from the definition of (ST-TS)S=S(ST-TS)
Their trace should be equal
And this is the place where the given information is used
收錄日期: 2021-04-25 16:55:12
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080216000051KK02727