pembahasan :
k = 1/20-21 [ 5 -7 ] [3 1]
-3 4 2 1
k = -1 [15 + -14 5 + -7]
-7 + 8 -3 + 4
k = -1 [ 1 -2 ]
-1 1
k = [-1 2]
1 -1
IDI = ad -bc
= 1 -2
= -1
Baca Juga: Bocoran Soal PTS Ganjil Matematika Wajib Kelas 10 SMA se-Indonesia Bagian 2
16. Diketahui matrik M = [1 1] invers matriks M =...
3 4
pembahasan :
invers itu 1 / Determinan
sehingga =