Kak Mohon Bantuannya, Tolong Sama Caranya Ya

Kak mohon bantuannya, tolong sama caranya ya

 

Jawaban:

Misal

x - 1 = a, y + 2 = u, z = c

2a + 3b + 3c = 4 \\ 2a - 6b + 9c = 5 \\ 4a + 3c = 4 \\ \\ d = \begin{vmatrix}& 2& 3& 3 \\& 2 & - 6& 9\\ & 4& 0&3 \end{vmatrix} = 4 \times 45 + 0 + 3 \times ( - 18) = 126 \\ \\ d_{1} = \begin{vmatrix}& 4& 3 & 3 \\& 5& - 6 & 9\\ & 4 & 0 & 3 \end{vmatrix} = 4 \times 45 + 0 + 3 \times ( - 39) = 63 \\ \\ d_{2} = \begin{vmatrix}& 2& 4& 3 \\& 2& 5 & 9\\ & 4 & 4 & 3 \end{vmatrix} = 30 + 144 + 24 - 156 = 42 \\ \\ d_{3} = \begin{vmatrix}& 2& 3& 4 \\& 2& - 6 & 5\\ & 4 & 0& 4 \end{vmatrix} = 4 \times 39 + 0 + 4 \times ( - 18) = 84 \\ \\ a = \frac{d_{1}}{d} \: \: \: \: \: b = \frac{d_{2}}{d} \: \: \: \: \: c = \frac{d_{3}}{d} \\ \\ a = \frac{1}{2} \: \: \: \: \: b = \frac{1}{ 3} \: \: \: \: \: c = \frac{2}{3} \\ \\ x - 1 = 2 \rightarrow{x = 2 + 1 = 3}\\ y + 2 = 3 \rightarrow{y = 3 - 2 = 1} \\ z = \frac{3}{2} \\ \\ (x .\: \: \: y \: \: \: z) = (3 \: \: \: 1 \: \: \: \frac{3}{2} )

Jawaban A


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