Iteration

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Question 1
Hard
a.

Show that the equation 3x3−2x2−4=03x^3 - 2x^2 - 4 = 03x3−2x2−4=0 has a solution between x=1x = 1x=1 and x=2x = 2x=2.

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b.

Show that the equation 3x3−2x2−4=03x^3 - 2x^2 - 4 = 03x3−2x2−4=0 can be rearranged to give: x=43x−2\displaystyle x = \sqrt{\frac{4}{3x - 2}}x=3x−24​​

[1]
c.

Starting with x0=1.5x_0 = 1.5x0​=1.5, use the iteration formula xn+1=43xn−2\displaystyle x_{n+1} = \sqrt{\frac{4}{3x_n - 2}}xn+1​=3xn​−24​​ twice to find an estimate for the solution to 3x3−2x2−4=03x^3 - 2x^2 - 4 = 03x3−2x2−4=0.

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Iteration Questions

  1. GCSE
  2. /Maths
  3. /Iteration