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Core 3 maths Simpsons rule

Please could someone help me with the AQA June 2016 Core 3 question 2 d.ii.
There is a link to the paper here if that helps
http://filestore.aqa.org.uk/sample-papers-and-mark-schemes/2016/june/AQA-MPC3-QP-JUN16.PDF
But after finding the integral of 5-x^x using the Simpsons rule I did 5-this answer (the integral of 5-x^x). But the markscheme says 6-previous ans. Is it something to do with the fact the limits are 1.7 and 0.5 hence the difference in 1.2 and 5x1.2 is 6 or am I completely off with that.
Thank you for any help.
Integral of (5-X^x)= I,(where I is the integral you worked out in part i )
therefore, integral of 5-integral of X^x= I
and you get integral of X^x=integral of 5-I
Reply 2
Original post by Radioactivedecay
Integral of (5-X^x)= I,(where I is the integral you worked out in part i )
therefore, integral of 5-integral of X^x= I
and you get integral of X^x=integral of 5-I


Yeah that's what I did but the mark scheme says the answer is 6-I.
Original post by ruby_zara
Yeah that's what I did but the mark scheme says the answer is 6-I.


Am 90% sure thats an error on their part cuz that makes no sense to as to why they would do that.
Reply 4
Original post by Radioactivedecay
Am 90% sure thats an error on their part cuz that makes no sense to as to why they would do that.


Yeah thats what I thought but I read the examiners report and it said

'The most common error was to subtract the answer to part (i) from 5 rather than 6.'

so idk. Thank you anyway though.
Original post by ruby_zara
Yeah thats what I thought but I read the examiners report and it said

'The most common error was to subtract the answer to part (i) from 5 rather than 6.'

so idk. Thank you anyway though.


Actually no the ms and I are both correct because its the integral of between those limits and that integral equals 6 so just doulbe check that

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