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avatar+17 

C= [4  3]

      [1  1]

 

E= [1  -3]

      [-1  4]

 

Is C the multiplicative inverse of E? explain.

 Sep 23, 2018
 #1
avatar+4779 
+2

well let's multiply them

 

\(\begin{pmatrix}4 &3\\1&1\end{pmatrix} \begin{pmatrix}1 &-3\\-1&4\end{pmatrix} =\begin{pmatrix}1&0\\0&1\end{pmatrix}\)

 

so yes C and E are multiplicative inverses

 Sep 23, 2018

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