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# May 25th Edexcel Core 2 Questions and answers. [Unofficial mark scheme]

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1. I am quite pissed. I got full marks in this paper, but for question 1.b. I wrote -1.602. Would that be penalised? And does that mean I can still get full UMS?
2. (Original post by X_IDE_sidf)
Thankyou, sorry I missed that, , write b in terms of a
What would you say I would get, I wrote a in terms of b?
3. (Original post by Olmeister)
What would you say I would get, I wrote a in terms of b?
see first post/mark scheme 8 i. I have included it.
4. (Original post by Fatmanlolololol6)
I am quite pissed. I got full marks in this paper, but for question 1.b. I wrote -1.602. Would that be penalised? And does that mean I can still get full UMS?
I would imagine the MS would say ignore signs. and full ums is usually 73-74 not 75.
5. (Original post by X_IDE_sidf)
see first post/mark scheme 8 i. I have included it.
No I mean I did it the wrong way around?
6. 8.i is wrong. It's b=(a-5)/9
7. Indeed, I believe 8(i) is (a-5)/9.

Other than that, all of the others seem right. I suppose it's now down to just showing enough on proof questions. Though on Q9 they were only 3 marks each...
8. (Original post by Olmeister)
No I mean I did it the wrong way around?
Ahh sorry, I would suspect that you would get nothing for that. maybe M1 but it depends what you wrote.
9. Which was the q that said don't use graphical or numerical methods ?
10. (Original post by X_IDE_sidf)
1 Geometric series question, prove given and workout sum to infinity. Then find the difference between the 9th and 10th term

2 Trapezium rule. in the interval with 4 trapeziums

3 Circle centred at . Find the equation of it and of a tangent at point

4 where find the remainder when divided by then factorise it fully given is a factor.

5 Expansion of . The using that expand in the form given the coefficient of

6 solve for and

7 This was and then find the limits (where it crossed the axis.

8 , write b in terms of a then find given .

9 Find optimum perimeter of a funny shape which comprised a rectangle, sector and a equilateral triangle, need diagram.
Image by Cake_Chan
Equations given, that needed proving are,
and

1 a) (2 marks) proof
b) (2 marks)
c) (2 marks)

2 a) (1 mark)
b) (3 marks)
c) (2 marks)

3 a) (2 marks)
b) (3 marks)
c) (4 marks)

4 a) (2 marks)
b) (2 marks)
c) (4 marks)

5 a) (4 marks)
b) (1 mark)
c) (2 marks)
d) (2 marks)

6 i) (3 marks) or
ii) (6 marks) or

7 a) (3 marks)
b) (3 marks)

8 i) (3 marks)
ii) (4 marks)

9 a) (2 marks)
b) (3 marks) proof
c) (3 marks) proof
d) (5 marks)
e) (2 marks) is a minimum at

This is useful and was spread out over another thread so I thought I would post it here. The missed answers were all either proofs or not suited to a single number response.
Just to point out fort he first question, you knew what r was... I can't remember correctly but I think it was 3/4
11. 8i is wrong.

12. (Original post by NotNotBatman)
8i is wrong.

(Original post by X_IDE_sidf)
see first post/mark scheme 8 i. I have included it.
(Original post by Waterrh72)
8.i is wrong. It's b=(a-5)/9
(Original post by LukeB98)
Indeed, I believe 8(i) is (a-5)/9.

Other than that, all of the others seem right. I suppose it's now down to just showing enough on proof questions. Though on Q9 they were only 3 marks each...
Thankyou for pointing my miss copy out. It is minus 5 not plus.
13. (Original post by asinghj)
Just to point out fort he first question, you knew what r was... I can't remember correctly but I think it was 3/4
Thank you, it was
14. (Original post by NotNotBatman)
8i is wrong.

Bro could you write :

1/3 a -5/9 all divided by 3. Is this correct as well?
15. (Original post by Randall13)
Bro could you write :

1/3 a -5/9 all divided by 3. Is this correct as well?
No, it would have to be
16. (Original post by X_IDE_sidf)

8 i) (3 marks)
ii) (4 marks)
I got a different answer to 8i and cant see where I went wrong

(Original post by Randall13)
for the first part of the logs

I said 1/3 = 3b+1/a-2

then 1/3a -2/3= 3b+1

1/3a-5/3=3b

1/3a-5/3 all divided by 3 = b

Is this correct and how many marks would i lose if incorrect?
I got the same as this
17. (Original post by NotNotBatman)
No, it would have to be
How many marks would i lose out of 3?
18. what if i find the limits of 7b in 7a?
19. hahahhahahah i wish we could send this to edexcel
they tryna stop arsey but arsey left a legacy
they aint gonna stop tsr
20. (Original post by BainesyA)
I got a different answer to 8i and cant see where I went wrong

I got the same as this
8 i)

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