Tentukan hasil perkalian bilangan matriks 3×3 berikut ini. A=[(1 2 3)(4 5 6)(7 8 9)] B=[(9 8 7)(6 5 4)(3 2 1)]

Halo, Mino M. Kakak bantu jawab ya :) Jawabannya adalah [(30 24 18)(84 69 54)(138 114 90)]. Perhatikan penjelasan berikut. Ingat! Jika matriks A = [(a b c)(d e f)(g h i)] dan B = [(j k l)(m n o)(p q r)] berlaku : AB = [(a.j+b.m+c.p a.k+b.n+c.q q.l+b.o+c.r)(d.j+e.m+f.p d.k+e.n+f.q d.l+e.o+f.r)(g.j+h.m+i.p g.k+h.n+i.q g.l+h.o+i.r)] Diketahui matriks-matriks : A = [(1 2 3)(4 5 6)(7 8 9)] B = [(9 8 7)(6 5 4)(3 2 1)] Maka : AB = [(1 2 3)(2 3 4)(1 5 6)][(-2 3 -1)(-8 3 2)(7 -3 -1)] ...[(1.9+2.6+3.3 ..... 1.8+2.5+3.2 ..... 1.7+2.4+3.1)] = [(4.9+5.6+6.3 ..... 4.8+5.5+6.2 ..... 4.7+5.4+6.1)] ...[(7.9+8.6+9.3 ..... 7.8+8.5+9.2 ..... 7.7+8.4+9.1)] ...[(9+12+9 ....... 8+10+6 ....... 7 + 8 + 3)] = [(36+30+18 ... 32+25+12 ... 28+20+6)] ...[(63+48+27 ... 56+40+18 ... 49+32+9)] = [(30 24 18)(84 69 54)(138 114 90)] Jadi, hasil perkalian bilangan matriks tersebut adalah [(30 24 18)(84 69 54)(138 114 90)]. Semoga membantu ya :)