You are Here: Home >< Maths

# 2016 Edexcel C2 Morning exam[discussion thread]

Announcements Posted on
Would YOU be put off a uni with a high crime rate? First 50 to have their say get a £5 Amazon voucher! 27-10-2016
1. (Original post by Cake_Chan)
Attachment 538103
Here a drawing (i made it in paint) of the diagram.
Thankyou,

http://www.thestudentroom.co.uk/show....php?t=4117691
2. (Original post by X_IDE_sidf)

1 b) (2 marks)
c) (2 marks)

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

3 a) (2 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 b) (3 marks)

8 ii) (4 marks)

9 a) (2 marks)
d) (5 marks)
c) (2 marks) is a minimum at

my unofficial mark scheme
Thanks! But how come the marks don't add up?
3. (Original post by Frappé)
Thanks! But how come the marks don't add up?
I didn't include the proofs.
4. (Original post by X_IDE_sidf)
I didn't include the proofs.
Add in how many marks each of the proofs were at least and it's perfect! Good job man.
5. (Original post by X_IDE_sidf)

1 b) (2 marks)
c) (2 marks)

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

3 a) (2 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 b) (3 marks)

8 ii) (4 marks)

9 a) (2 marks)
d) (5 marks)
c) (2 marks) is a minimum at

my unofficial mark scheme

Posted from TSR Mobile

Posted from TSR Mobile
6. Here is the tread where I have all the marks and all the questions, http://www.thestudentroom.co.uk/show...691&p=65157957 <-- Go there to comment on them (they are from memory/calculator history so may be slightly off.)
7. You had to put your 16.7 value for x back into the origional equation to find the perimeter.
8. That wasn't bad. They have asked a lot worse questions in the past
9. (Original post by M8ty)
That was so easy😂
Expect grade boundries to be high.
You must be stupid to have not got at least 70+
Ok somebody is feeling cocky, sorry not everyone has a mistake free brain
10. (Original post by shayefc)
can anyone remember the total marks for Q9?
yes it was 15 marks.. if you got all of it right, that 20UMS in the bag
11. Would I lose a mark if I didn't put + C on the integration question? I thought we didn't need it in C2?
12. Completely ran out of time
13. I got the difference between u9 and u10 negative does that matter
14. I did that too actually stressing so much
15. (Original post by Failedexamms)
I got the difference between u9 and u10 negative does that matter
no
16. (Original post by musictagj)
Guys it asked for P not x, so 17 is wrong because you had to substitute in x=16.633 and then you get 120 to the nearest metre

Posted from TSR Mobile
I actually laughed at everyone saying they got 17...

CLASSSIICCC mistake, they forgot to substitute back into the original formula for P. I literally came so close to keeping my answer of 17 before realizing i didnt sub it back in, yeah the actual answer was 120.something and rounded to 120.

For the Next part you sub this number into the second differential.

P'' = 2000/x^3 = 0.0*something tiny but bigger than zero*

because P'' > 0 (and P' = 0) we know its a minimum point.
17. (Original post by Failedexamms)
I got the difference between u9 and u10 negative does that matter
I used mod notation; it means turn the answer into a positive if its negative.
I then wrote underneath the actual negative difference just to be sure of the mark
18. (Original post by Hangk13)
What did everyone get when substituting their x value into the 2nd differential to show it was a minimum point? (very last question part e)

I got a really small decimal??
0.4 something something
19. (Original post by Tobiq)
I actually laughed at everyone saying they got 17...

CLASSSIICCC mistake, they forgot to substitute back into the original formula for P. I literally came so close to keeping my answer of 17 before realizing i didnt sub it back in, yeah the actual answer was 120.something and rounded to 120.

For the Next part you sub this number into the second differential.

P'' = 2000/x^3 = 0.0*something tiny but bigger than zero*

because P'' > 0 (and P' = 0) we know its a minimum point.
Hate to sound like a dick but totally agree hahaha, am resitting and was super happy at the number of year 12s looking like they had just been hit by a bus, sorry guys
20. (Original post by HannahC-H)
0.4 something something
it was like 1.5 x 10^-3, i remember. 0.4 is way too big but i dont think the size matters, just as long as its bigger than zero

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: May 28, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

### University open days

Is it worth going? Find out here

Poll
Useful resources