Edexcel P4 2023 October — Question 4

Exam BoardEdexcel
ModuleP4 (Pure Mathematics 4)
Year2023
SessionOctober
TopicProof
  1. (a) Prove by contradiction that for all positive numbers \(k\)
$$k + \frac { 9 } { k } \geqslant 6$$ (b) Show that the result in part (a) is not true for all real numbers.
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