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# Edexcel A2 C4 Mathematics June 2015 - Official Thread Watch

1. Now I've done a fair few papers in the past few days (Mixture of Solomon and Edexcel series). My question to everyone is: should I do another paper on the morning before the exam?
2. (Original post by Ripper Phoenix)
anyone june 13R QUESTION 4B PLEASE??
Take out a factor of 1000
3. (Original post by Fvthoms)
Now I've done a fair few papers in the past few days (Mixture of Solomon and Edexcel series). My question to everyone is: should I do another paper on the morning before the exam?
I am but it's up to you
4. Guys I'm a bit confused about June 2013 8b, please some help?
Guys I'm a bit confused about June 2013 8b, please some help?
http://www.examsolutions.net/a-level...8&solution=8.2
6. Can you leave vectors in column form?
7. (Original post by MasonPye)
Can you leave vectors in column form?
Yes, I normally do.
8. Any tips on drawing diagrams for vectors questions I just cant picture the diagram right sometimes
9. Good luck all.

We got this. Don't stress.
10. Yeh good luck everyone
11. (Original post by Hudl)
Any tips on drawing diagrams for vectors questions I just cant picture the diagram right sometimes
This may sound a bit obvious but make sure you use all the information you've been given, eg in earlier parts of the question
12. (Original post by Fvthoms)
Now I've done a fair few papers in the past few days (Mixture of Solomon and Edexcel series). My question to everyone is: should I do another paper on the morning before the exam?
I'm not sure - personally, I'm planning to do an easy-ish paper this morning just to get myself in the swing of things, whilst not overburdening myself
13. (Original post by V0ldemort17)
Haha I had the same panic yesterday 😁

Btw guys which volumes do we need to know for core 4? Cylinder,cone...?

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I hope they're all given but 4/3pi r^3 for sphere, 1/3 base area x height for cones/pyramids and base area x height for cylinders/prisms covers pretty much everything anyway and it's not too bad to learn
14. If i end up in a situation like this do i just follow through and if i got a negative answer, change to positive because its an area?

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15. (Original post by xy0mz)
If i end up in a situation like this do i just follow through and if i got a negative answer, change to positive because its an area?

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you should never end up with a negative area, even with the limits that way round. it will always work out as positive -- and if it doesn't, you've gone wrong somewhere.
16. Any tips on finding out a vector of something like AB?

say, you got AB on L1, how do you find the vector for it? is is b-a or a-b? I always get confused and end up having minus the angle that I find by 180....
17. ~

Can someone explain b) to me. I don't quite fully understand why you take out a factor of 1000 . Why wouldn't you rearrange 7100 to = 8-9x and solve for x and sub that back in?
18. Good luck everybody :-D stay calm and read the question twice and chillllll

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19. (Original post by xy0mz)
If i end up in a situation like this do i just follow through and if i got a negative answer, change to positive because its an area?

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your mistake is so evident! your limits!! put the higher one on top ALWAYS!

(Original post by elliemoriarty)
you should never end up with a negative area, even with the limits that way round. it will always work out as positive -- and if it doesn't, you've gone wrong somewhere.
THIS IS NOT TRUE! He has used the limits the other way round so he would get the negative of the correct answer so the area cannot be negative so its positive! He will still be correct
20. (Original post by Nurishment)

Can someone explain b) to me. I don't quite fully understand why you take out a factor of 1000 . Why wouldn't you rearrange 7100 to = 8-9x and solve for x and sub that back in?
if you did that, x would be bigger than 8/9

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