n はよ皚

n顶よ皚A璝Τ n顶よ皚Bㄏ眔 AB = BA = In嘿 B Aはよ皚A-1 ボ

讽 n顶よ皚A ㄣΤはよ皚玥嘿 A琌癴よ皚 玥

よ皚A Τはよ皚璶兵ン琌 det(A) ≮ 0

n 顶よ皚はよ皚

顶よ皚 A =          det(A) =       = ad-bc

        

 

  △ A-1 =    

            

n 顶よ皚はよ皚

顶よ皚 A =

1.det(A) : 癸莱じ籔A常妓顶︽Α

  det(A) = 

     

2.緇 Aij 琌盢材 i 籔材 j ︽じ埃┮眔顶

︽Ατ (-1)i+jAij 碞嘿 aij 緇

A-1 =       [A( j , i )緇]3x3

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