Soal dan Pembahasan Matriks

 





            

a.1                               d.11

b.6                               e.12

c.9

Jawaban : d

Dari AC = B maka |A|.|C| = |B|

(1.3 – 1.2).|C| = (4.3 – 1.1)

                              |C| = 11

             

       transpose matriks C, maka nilai x.y = ….

a.10                             d.25          

b.15                             e.30

c.20

Jawaban : C

  

Diperoleh :

y – 4 = 1

      y = 5 dan

x + y – 2 = 7

x + 5 – 2 = 7

            x = 4

      Nilai x.y = 4.5 = 20

Maka : C

5y = – 15

  y = – 3

3x + 2y = 0

3x – 6   = 0

         x  = 2

Nilai 2x + y = 4 – 3 = 1