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# Edexcel C2 20th May 2015 *Official Thread* watch

1. (Original post by particlestudent)
But it was easy right? I found it so easy
Yeah it was good and also unexpectedly short! Everyone pray for our paper tomorrow to be just like that

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2. (Original post by particlestudent)
But it was easy right? I found it so easy
Very easy

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3. (Original post by enaayrah)
For the rSn line, don't put the last term (ar^n+1) in, it just complicates things (and it can't really be a part of Sn if you think about it?)
The last term is not ar^n+1 its ar^n . un =ar^n-1 so r Un =ar^n

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4. I don't c2 many people looking forward for the maths exam tomorrow
5. (Original post by Azzer11)
Wtf different people are saying different things? We never got taught it...

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The formula is on spec but we dont need to prove it or show whwre it comes from

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6. (Original post by Lynku555)
Good point!

I just get confused as to how ar^n - 1 minus ar^n cancel out idk why
Plug a number in as 'n' and take away fully, it should work out
7. (Original post by samb1234)
The last term is not ar^n+1 its ar^n . un =ar^n-1 so r Un =ar^n

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Yeah that's what I meant
8. GUYS HELP https://c4a3f001dcd45afe69d0ceec8300...%20Edexcel.pdf
the very last question?? i have no idea how to do it
9. (Original post by particlestudent)
I don't c2 many people looking forward for the maths exam tomorrow
Pls stop
10. (Original post by Azzer11)
Wtf different people are saying different things? We never got taught it...

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its 100% is I checked the spec last week and it says and I quote
'The proof of the sum formula should be known'
its on page 28 right hand side of the spec and in the 2007 January paper it came up as question 10a
11. (Original post by a.a.k)
The formula is on spec but we dont need to prove it or show whwre it comes from

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yes we do check the spec page 28
12. (Original post by a.a.k)
Hulk smash calculators hulk eat calculator buttons

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*Laughs evilly* Stupid beast. That was your only help for this exam you're worrying so much about. Asgardians don't need midgardian toys to do maths.
[What the heck am I doing??? Loki - stop it! I need to go to bed!]
Nope, that aint gonna happen any time soon.
13. (Original post by ahony004)
yes we do check the spec page 28
Theres two formula sum to n number and su to infinity idont we need to prove sum to i finity but we have to prove other onw

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14. (Original post by ahony004)
its 100% is I checked the spec last week and it says and I quote
'The proof of the sum formula should be known'
its on page 28 right hand side of the spec and in the 2007 January paper it came up as question 10a
We need to prove the sum formula not the sum to infinity formula though
15. (Original post by ahony004)
its 100% is I checked the spec last week and it says and I quote
'The proof of the sum formula should be known'
its on page 28 right hand side of the spec and in the 2007 January paper it came up as question 10a
Sum to n terms or sum to infinity?
16. (Original post by mymomsaidstudy)
GUYS HELP https://c4a3f001dcd45afe69d0ceec8300...%20Edexcel.pdf
the very last question?? i have no idea how to do it
I go stuck on this one as well.
17. There is an explanation bee similar to this on examsolutions.net got to the edexcel videos>geometric sequences>I think it's the investment example. I've had to watch it a couple of times
18. (Original post by InkHeart)
*Laughs evilly* Stupid beast. That was your only help for this exam you're worrying so much about. Asgardians don't need midgardian toys to do maths.
[What the heck am I doing??? Loki - stop it! I need to go to bed!]
Nope, that aint gonna happen any time soon.
Calculators dont make a man
Man makes calculators.

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19. (Original post by LearningGeek)
where can you access the reserved papers for past years?
If a paper has to be replaced for any reason - a batch of papers goes missing in the post, a set of papers is accidentally leaked by an exam centre due to a **** up, or someone with access to the papers maliciously leaks them to facilitate cheating - a reserve paper is pulled from the secure collection of already written/tested exam papers and printed for use. At that point it becomes the real paper and that's the one that is available from past paper archives. The original paper that was intended to be used is usually released to teachers for internal use but there may not be an official mark scheme to go with it. R papers are not reserved papers they are Regional papers for use by candidates outside the UK. All but the latest ones can be downloaded from the edexcel web site. There are no C2 papers that have needed to be replaced.

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20. (Original post by El-Presidente)
Volume of a cone, pyramid, sphere...
That does not help..

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