9231 P22 - Nov 2022 - Q1 - 5 marks
5999
(a) Find the set of values of \(k\) for which the system of equations
\(\begin{aligned} x+2 y+3 z & =1 \\ k x+4 y+6 z & =0 \\ 7 x+8 y+9 z & =3 \end{aligned}\)
has a unique solution.
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