SPS SPS FM Pure 2025 February — Question 10

Exam BoardSPS
ModuleSPS FM Pure (SPS FM Pure)
Year2025
SessionFebruary
Topic3x3 Matrices

10. Three planes have equations $$\begin{array} { r } 4 x - 5 y + z = 8
3 x + 2 y - k z = 6
( k - 2 ) x + k y - 8 z = 6 \end{array}$$ where \(k\) is a real constant.
The planes do not meet at a unique point.
  1. Find the possible values of \(k\).
  2. For each value of \(k\) found in part (a), identify the configuration of the given planes. Fully justify your answer, stating in each case whether or not the equations of the planes form a consistent system.
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