x Turn on thread page Beta
 You are Here: Home >< Maths

# Edexcel A2 C4 Mathematics June 2015 - Official Thread watch

1. (Original post by Bustamove)
I think I only wrote down (24/5 , 16/5) ... I don't think we had to find a second one? I may be wrong... I can't remember which question this is, but i remember getting those values.. well the positive ones anyway
It was the one with the differential equation (q2 or 3?). I got 16/5 but thought it was wrong so went on with the paper - didn't have time to finish that question off at the end :[
3. (Original post by dominicwild)
I remember it said co-ordinates. Which implies more than one. Thought I got mine wrong since they were strange numbers.
****... Ah stupid mistake there....
4. (Original post by GTA5)
I doubt it. 0.2 yrs for the animals to reach a population of "4000"?! It has to be in degrees so u get 27yrs. C'mon lets be realistic. Do u think humans can produce 4000 offspring in 73 days? (0.2 yrs)
1. It didn't say what number the population started at, it could have started at 3999

2. With questions like these you always use radians...
5. For the integration of 9^x, did anyone put 9^(x+1)/(x+1). LOL I'm pretty sure that's completely wrong
6. For people wondering when arsey will do the mark scheme. It won't be sooner than 2 hours from when the exam finished. Be patient, concentrate on the exams you have coming up.
7. who got 2 + 5/4x - 25/64 x^2 for the first question binomial expansion
8. (Original post by pinkcrystal)
Yeh, It said find the coordinates of the points. So when you expanded you got (5y^2 - 16)(5y^2 + 16) = 0 so both of those are x coordinates and I just found the corresponding y coordinates. But if you got one of them i'm sure you've got most if not all marks
Ah ****!... stupid mistake there...
9. I think it was (3^2x)/2ln3 as when 3^2x differentiates it is just multiplied by a factor of 2ln3
10. (Original post by GTA5)
I doubt it. 0.2 yrs for the animals to reach a population of "4000"?! It has to be in degrees so u get 27yrs. C'mon lets be realistic. Do u think humans can produce 4000 offspring in 73 days? (0.2 yrs)
I've also done a past paper where you had to use radians for a question like this.
11. well there goes my A, felt like ive done so well on the other 5 units too. i'll be lucky to get a C on this exam now hoping for a lot of method marks :// completely demotivated now.
12. Attachment 429765429767429760Attachment 429765429767
Attached Images

13. I think i made so many silly mistakes. That was wayyyyy to long. Loooooonnnnnnngggggggg.
Q1 and Vectors was nice though.
14. The most annoying part of that exam is that I actually knew how to do every question but would have needed about an hour longer to finish each one.
15. (Original post by The fish inspect)
For people wondering when arsey will do the mark scheme. It won't be sooner than 2 hours from when the exam finished. Be patient, concentrate on the exams you have coming up.
It'll be more than that since I don't think he can do the paper either...

:[
16. (Original post by Ohwhenwilson)
For q1) was it expand to x^2 or x^3, i went up to x^3 but people saying it was 2 😁
the question said x^2.
17. (Original post by Bustamove)
****... Ah stupid mistake there....
18. VOTE NOW ON HOW YOU FOUND THIS EXAM
Note: C4 JUNE 2015 UK paper ONLY!
19. (Original post by sat_freak)
We don't know if they are human.....

All calculations in serious calculus assume radians.

at t=0, population was already 3000.
So for 4000, another 0.473 years or 5.5 months seems reasonable.
Sometimes, if the exam didn't specify radians or degrees, in the mark scheme there'll be alternative solutions for both cases, both obtaining full marks.
(They've even been really generous in the past by accepting theta in degrees even when it gave the range of theta between 0 and π/2 or something)
20. lol i think arsey didn't even want to attempt the paper this year.

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:
Updated: April 20, 2016
Today on TSR

### Boyfriend slept with someone else

...we were on a break

### Mum says she'll curse me if I don't go to uni

Poll
Useful resources

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

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