# Maths iterative formula

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#1

number 3 part 2 asked to use iterative formula right

i tried to use it as u can see from x1 to x9 but i cannot find 2.12... which part im makin mistake?
0
1 month ago
#2
(Original post by deviany)

number 3 part 2 asked to use iterative formula right

i tried to use it as u can see from x1 to x9 but i cannot find 2.12... which part im makin mistake?
For the first part, you must use x = 2 and x = 3.
Substitute those values in the equation given and you'll notice a sign change.
The change in sign indicates that there is a root in the given interval.

For the second part, use x = 2 for the iteration formula and keep working till you get the similar answer to 3 d.p.
https://www.bbc.co.uk/bitesize/guide...0and%20so%20on.

Hope this helps
1
1 month ago
#3
(Original post by deviany)

number 3 part 2 asked to use iterative formula right

i tried to use it as u can see from x1 to x9 but i cannot find 2.12... which part im makin mistake?
As mentioned Sam_R9 you only need to calculated two values for part i of the question.

In part ii you appear to have calculated .

You should be doing as given in the question.
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