You are Here: Home >< Maths

# Edexcel C3 June 2016 - Unofficial Mark Scheme

Announcements Posted on
Four hours left to win £100 of Amazon vouchers!! Don't miss out! Take our short survey to enter 24-10-2016
1. So ****ing pissed. Found the paper fine but I couldn't do the last part to que 9. Then I managed to work it out when i got home before checking on here but it's Obvs too ****ing late. Didn't register that "b/e" in the LN function included the function e. Kept thinking e was a constant, for **** sake.
2. for question 8b. Was it just me who got only 2 angles instead of 4?...
3. (Original post by jack_98)
how do you get over it..coz i skipped all of it as well
am not over it at al, am clicking my fingers and binge eating till I die , its left me needing 100 ums for c4 to get an A, coz that's going to happen
4. (Original post by Don Pedro K.)
guys if you don't cross out your answers then they have to mark whatever's there right? So if you showed an incorrect method and then a correct one but you didn't cross out the incorrect one then you'll still get the marks?

13 1 20 8 42
you're right
5. (Original post by 13 1 20 8 42)
you're right
Okay thank God haha xD
6. I think i dropped anywhere between 6-10 marks, oh well :/
7. (Original post by Engineerrookie)
How marks do you think I have lost, if I've lost one do you think I could get an A* losing 6 marks???
Definitely, A* is probably going to be 68-69 max
8. (Original post by veldt127)
It asked for simplest form; you could root that (as it's half a log) and get ln2.5.
i swear it said exact form not simplest form ?
9. (Original post by coolguy123456)
Definitely, A* is probably going to be 68-69 max
Thanks! )
10. (Original post by eyeman567)
Yeah I think it was that, I don't get how you solve it though

I subbed G into F

Got 28 / (x-2) = x + 1

Then ended up with X^2 - x - 30 = 0

which Im pretty sure is wrong and unsolvable
That's what I got!!
11. (Original post by veldt127)
I'm not 100% sure on all of these, but I think most are correct.

Question 1
Spoiler:
Show
A. -5, 6
B. 6
Question 2
Spoiler:
Show
A. (20-4x^2)/(x^2+5)^2
B. >sqrt(5), <-sqrt(5)
Question 3
Spoiler:
Show
A. R= sqrt(5)
a= 26.57°
B. 33.0°, 273.9°
C. 86.1°
Question 4
Spoiler:
Show
Ai. 21
ii. ln(2.5)
iii. 25
B. Show that question
C. 1.4368, 1.4373
D. Show the root was in [1.4365, 1.4375]
Question 5
Spoiler:
Show
i. 0.9463
ii. 0.5cosec(4Y)
Question 6
Spoiler:
Show
A. A=3, B=4
B. Normal eqn. -0.5x + 17.5
Question 7
Spoiler:
Show
A. graph of arcsin, sort of a rotated S shape. Went through (0,0), (-1,-pi/2), (1,pi/2)
B. -1-0.5sqrt(3)
Question 8
Spoiler:
Show
A. Trig proof
B. -2.848, -1.277, 0.294, 1.865
Question 9
Spoiler:
Show
A. 6.740 - dose after 4 hours
B. show that dose equalled a value after 7 hours
C. 5ln(2 + 2e^-1)
A = 5, B = 2
PDF with working for 1-4 and 9 : http://www.thestudentroom.co.uk/atta...5&d=1466508775
Think I've got all the same!
12. can anyone tell me the distribution of marks for each question/part ? cheers
13. Did it definitely say simplest form cos I'm also sure it was exact
14. X^2 - X - 30 can be solved.. it factorises into (X-6)(X+5). Its what I got too leading to X = 6 and -5 ☺

Posted from TSR Mobile
15. For Q6, how many marks will I lose for using 0.5 as the gradient instead of -0.5? I differentiated correctly, got 2 as the gradient, and got the y value (16) at x=3 but the wrong equation for the normal
16. Its not unsolvable? (x-6)(x+5)?
17. What was 5a?
18. (Original post by immagooner)
can anyone tell me the distribution of marks for each question/part ? cheers
Number of marks for each question:
1) a: 4, b: 1
2) a: 4, b: 3
3) a: 3, b: 5, c: 2
4) a: 5, b: 2, c: 2, d: 2
5) a: 5, b: 5
6) a: 4, b: 5
7) a: 2, b: 3
8) a: 4, b: 6
9) a: 2, b: 2, c: 4
19. (Original post by Questioner1234)
For 2a would I get the marks if I simplified the numerator to 4(5-x^2)????????

Posted from TSR Mobile
That's right though it said simplest form and the last step was to simplify the numerator
20. (Original post by onur_m)
For Q6, how many marks will I lose for using 0.5 as the gradient instead of -0.5? I differentiated correctly, got 2 as the gradient, and got the y value (16) at x=3 but the wrong equation for the normal
You will probably lose 1-2 marks..you'll receive mostly method marks

Posted from TSR Mobile

## 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
your full birthday is required
1. Oops, you need to agree to our Ts&Cs to register

Updated: September 7, 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

### Who is getting a uni offer this half term?

Find out which unis are hot off the mark here

Poll
Useful resources

## Make your revision easier

Can you help? Study help unanswered threadsStudy Help rules and posting guidelinesLaTex guide for writing equations on TSR

## Groups associated with this forum:

View associated groups
Study resources

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.