This video gives an explanation of how to work with difficult GCSE maths iteration questions, sometimes called ‘iterative formula.’ The questions can be extremely wordy … but should be absolutely fine once you get the general idea. There’s also some additional examples at the end of the page.
The question is aimed at GCSE maths grade 7+ calculator paper.
(a) Complete the table of values for y = x³ – 5x – 8
(b) On the grid, draw the graph of y = x³ – 5x – 8
(c) Show that when f(x) = 0, the equation f(x) = x³ – 5x – 8 can be rearranged to give x= ∛(5x+8)
(d) Use the iterative formula to find the real root of f(x) correct to 3 decimal places.
I hope it becomes a little clearer as you work through the GCSE maths iteration questions, before moving on to the higher levels. They do take a bit of a leap forward, although should be OK if you have viewed the earlier ones.
If you would like to find out more try these!
How to work with iteration part 2
Please do leave a comment below if you are not sure. Alternately you can view my YouTube channel and leave a comment there – I’ll always try to respond as quickly as possible.