Diketahui matriks A = (2-114), B = (x+y23y) C = (7231)

Apabila B – A = Cᵗ & Cᵗ = transpose matriks C maka nilai x . y =

20
Pembahasan:
B – A = Cᵗ
⎛x+y  2⎞ _  ⎛2  -1⎞ = ⎛7 3⎞
⎝3      y⎠     ⎝1   4⎠    ⎝2 1⎠
⎛x+y-2  2+1⎞ = ⎛7  3⎞
⎝3–1     y–4⎠    ⎝2  1⎠
⎛x+y-2     3⎞ = ⎛7  3⎞
⎝2         y-4⎠     ⎝2  1⎠
y – 4 = 1
y = 5
x + y – 2 = 7
x + 5 – 2 = 7
x = 4
Kaprikornus, x . y = 4 × 5 = 20
  Jika f(x) = 2x/x – 3, x ≠ 3