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# UNOFFICIAL MARKSCHEME Edexcel Maths Calculator paper 09/06/2016

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1. (Original post by miles354)
However, your'e looking at an equation with the highest power being 3, the change in increase gains as you input a greater number so the fact that you said 3.8 has a larger difference still doesnt prove that it is further away from the true value.
On the other hand, it is a fact that as the value of x increases in the equation, the numerical value also increases so the only way we can find whether x is closer to 3.7 or 3.8 is by using the midpoint 3.75, if the value is smaller than 45 when inputting 3.75 then we know that x is larger than 3.75, hence any number above 3.75 would be closer to 3.8 than 3.7
Heres my working, but a lot of people contradict me with the 3.75 method

The equation - x^3 - 5x = 34has a solution between 3 and 4
Use trial and improvement method to find this solution
You must show all your working

(before all this below i did 3.5 and 3.6)
3.7^3 - 5(3.7) = 32.153
34 - 32.153 = 1.847
So 3.7 is 1.847 away.

3.8^3 - 5(3.8) = 35.872
35.872 - 34 = 1.872
So 3.8 is 1.872 away.

This shows 3.8 being 0.025 further away than 3.7. 3.7 is closer.Therefore, the answer is 3.7, even though 3.75 gives an answer smaller than 34.
2. (Original post by pelaitsc45)
Yeah, I know, but the papers this year seem roughly the same difficulty.
No, it was a lot easier.
3. (Original post by Cygwin64)
Answers to every question Attachment 546611
LOOOL u have time how do u even remember the questions🙄🙄
4. (Original post by mkhs161)
I think I only dropped 4-5 marks. YEY ME.
Same. I lost:
-1 mark on the trial and improvement question
-2 marks on the quadratic formula question :3
Yet I got the last answer :/. Goes to show how silly mistakes can lose marks!
5. (Original post by LokiiR)
if you did it how u said u did it and showed that, you should get marks tbh
im hoping around 2/3 out of 4 for method
6. Any Foundation Unofficial mark schemes? Thanks
7. anyone know the marks available for each question?
8. (Original post by 34908seikj)
No, it was a lot easier.
Well, I guess it's subjective. We'll have to see.
9. i got 3.7 too ,, for trial and improvement someone please let me know if its 3.8 or 3.7 i was very sure
10. People are saying for trial and improvement the answer was 3.7 However, i got 3.8
can anyone explain the correct answer
11. If i put x=0.20 or =-2 and what not on the quadratic question do you think i would get the mark?
12. does anyone know what the grade boundaries could possibly be?
13. would 97-98 be a B??
14. (Original post by 34908seikj)
Wasn't the last question like 1/2 * 7 * 8 Sin(X) = 18

56Sin(x) = 36

Sin^-1(36/56) = X

x = 40

???

I think I did it wrong then.
You had to do the same thing but using the answer b^2+a^2-2bc Cos(x) then you would get 80.4.

Good luck on the rest tho xD
15. (Original post by epage)
For the trial and improvement one my few ids were saying they got 3.7 but I got 3.8 and I was 100% sure that was right?

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Yes, it was 3.8
16. Do you guys think 171(ish) /200 would be an A*?

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17. If i put x=0.20 or = -2. And what not for the quadratic question would i get a mark for it?

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18. (Original post by blueribbons99)
Do you guys think 171(ish) /200 would be an A*?

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I think so
19. (Original post by HollieGreenwood)
Assuming you mean 111? cx i'd have thought that would be enough, the grade boundaries should be fine c:
No, 211
20. I got 133/200 what grade roughly

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