Latihan Soal Edmodo Invers Matriks Nama: Kgs. Muhammad Rizky Kelas : XI. MIPA 2 Jawab: 3+p-(-3) = 8 q+5-(-1) = 5p p+6 = 8 q+5-(-1) = 10 p = 2 q = 4 p + 2pq + q = 2 + 2.2.4 + 4 = 2 + 16 + 4 = 22 Jawab: Matriks D = [ 1 -2 ] [ 3 -4 ] [ 2 -5 ] 3 . [ 3 4 ] + [ 5 -1 ] - [ 12 10] = [ 4 -5 ] [ 2 1 ] Det. D = | 4 -5 | | 2 1 | = 4.1 – 2. (-5) = 14 Jawab: Det. X = 1.2.0 + (-1).(-1).2 + 1.0.3 – 2.2.1 – 3.(-1).1 – 0.0.(-1) = 1 K11 =| 2 -1 | = 3 | 3 0 | K12 =| 0 -1 | = 2 | 2 0 | K13 =| 0 2 | = -4 | 2 3 | K21 | -1 1 | = -3 | 3 0 | K22 =| 1 1 | = -2 | 2 0 | K23 =| 1 -1 | = 5 | 2 3 | K31 = | -1 1 | = -1 | 2 -1 | K32 = | 1 1 | = -1 | 0 -