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  5. 想問這一題怎麼算
Mathematics
Senior High
數學好難
數學好難

想問這一題怎麼算

台前 期 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) A100B100=B100 A100 14 (2) E=| 24,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 L3
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