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​Q18: Question – Paper 3 – June 2018
Question

18 a) Show that the equation    x3 + x = 7    has a solution between 1 and 2

[2 marks]
​

b) Show that the equation    x3 + x = 7    can be rearranged to give

[1 mark]
​

c) Starting with x0 = 2,

use the iteration formula

three times to find an estimate for a solution of   x3 + x = 7

[3 marks]