4. Jika matriks A = ![\left[\begin{array}{ccc}4&-1&3\\1&4&-2\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D4%26-1%263%5C%5C1%264%26-2%5Cend%7Barray%7D%5Cright%5D "\left[\begin{array}{ccc}4&-1&3\\1&4&-2\end{array}\right]")
dan B = ![\left[\begin{array}{ccc}-1&3\\5&2\\3&-2\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-1%263%5C%5C5%262%5C%5C3%26-2%5Cend%7Barray%7D%5Cright%5D "\left[\begin{array}{ccc}-1&3\\5&2\\3&-2\end{array}\right]")
Maka matriks AB adalah....
Maka matriks AB adalah....
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=(4·(-1) (-1·5) 3·3 4·3 (-1)·2 3·(-2))
(1·(-1) 4·5 (-2)·3 1·3 4·2 -2·(-2))
=(-4+(-5)+9 12+(-2)+(-6))
(-1)+20+(-6) 3+8+4
AB=(0 4)
(13 15)
Sorry klo salah..
Semoga membantu:)
Mohon maaf jika terjadi kesalahan dalam menjawab^^
Semoga membantu:)