Question

Tolong bantu jawab dikasih caranya yang lengkap ya:)​

Answer 1

Verified answer

Nomor 19. Jawaban adalah B.

[tex] \tt \blue{ A = \begin{gathered}\left[\begin{array}{ccc}3& - 2\\4&5\end{array}\right]\end{gathered}} \\ \tt \green{det = 3(5) - ( - 2)(4)} \\ \tt \green{ = 15 -( - 8) = 23}[/tex]

Nomor 20. Jawaban adalah C.

[tex] \tt{A = \begin{gathered}\left[\begin{array}{ccc}3&1\\13&4\end{array}\right]\end{gathered}} \\ \tt \blue{det = 3(4) - 1(13)} \\ \tt \blue{ = 12 - 13 = - 1} \\ \\A^1 = - \frac{1}{1} \begin{gathered}\left[\begin{array}{ccc}4& - 1\\ - 13&3\end{array}\right]\end{gathered} \\ \\ A^1 = \begin{gathered}\left[\begin{array}{ccc} - 4&1\\13& - 3\end{array}\right]\end{gathered}[/tex]

[tex]\colorbox{pink}{\blue{ \boxed{ \tt{ \color{magenta}{maghfi24}♡}}}}[/tex]

Answer 2

jawaban ada di dalam foto tersebut