Edexcel P3 2023 June — Question 1

Exam BoardEdexcel
ModuleP3 (Pure Mathematics 3)
Year2023
SessionJune
TopicFixed Point Iteration

1. $$g ( x ) = x ^ { 6 } + 2 x - 1000$$
  1. Show that \(\mathrm { g } ( x ) = 0\) has a root \(\alpha\) in the interval [3,4] Using the iteration formula $$x _ { n + 1 } = \sqrt [ 6 ] { 1000 - 2 x _ { n } } \quad \text { with } x _ { 1 } = 3$$
    1. find, to 4 decimal places, the value of \(x _ { 2 }\)
    2. find, by repeated iteration, the value of \(\alpha\). Give your answer to 4 decimal places.