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  5. 想問這題怎麼算～
Mathematics
Senior High
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數學好難
數學好難

想問這題怎麼算～

2. A是以原點逆時旋轉旋轉矩陣,B是以y=mx做鏡射之鏡射矩陣,C是伸縮矩陣,I是乘法單位矩陣 (1)下列選項哪些正確?(多選題,全對5分,錯1選項3分,錯2選項1分) (A)AB=BA (B)B的反方陣等於B(C)存在正整數n使得A=I (D)C-'AC=A (E) A100 B100=B100A 100 (2)E= = [4 3 3 ,C是伸縮矩陣,EC為以y=mx做鏡射之鏡射矩陣,求矩陣C及m

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