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Original post by wam-bam
it's here

http://www.edexcel.com/migrationdocuments/GCE%20New%20GCE/N38210A-GCE-Mathematical-Formulae-Statistical-Tables.pdf

on page 5

also here is a briliant C2 in a page thing which gives you all the formulas we need and there's :smile: smiley faces next to the ones that are given to us in the formula booklet!

http://www.morehouse.org.uk/MH_PupilsPages/MH_PupilsResources_Pages/MH_ResourcesFiles/Math/C2inEssence.pdf

hope that helps!


Great! Thanks so much!:biggrin:
Reply 201
What are the proofs for geometric series?
Original post by 101101
What are the proofs for geometric series?


you need to prove the formula for the sum of a series
look it up in your text book or
http://www.examsolutions.co.uk/maths-revision/core-maths/sequences-series/geometric/proof-of-Sn/tutorial-1.php
(edited 11 years ago)
Reply 203
Original post by 101101
What are the proofs for geometric series?


[br]Sn=a+ar+ar2+...+arn1[br]rSn=ar+ar2+ar3+...+arn[br]{S}_{n}=a + ar + a{ r }^{ 2 } + ... + a{ r }^{ n-1 }[br]r{S}_{n}=ar + a{ r }^{ 2 } + a{ r }^{ 3 } + ... + a{ r }^{ n }

Subtracting:

[br]SnrSn=aarn[br]Sn(1r)=a(1rn)[br]Sn=a(1rn)1r[br][br]{S}_{n} - r{ S }_{ n }=a - a{ r }^{ n }[br]{S}_{n}(1 - r)=a(1 - { r }^{ n })[br]{S}_{n} = \frac {a(1 - { r }^{ n })}{1 - r} [br]
Reply 204
Here's my notes if anyone wants them :P
Original post by Brad0440
Here's my notes if anyone wants them :P


Thanks! These are great!
Reply 206
What are the reasons for your estimations of the area under a curve being over/under using the trapezium rule?

June 09 4c I've got the answer as 6.133 which is correct but then it asks whether this is an over or under estimate and asks for a reason why. Never seen this question before and it's 2 marks so if anyone could help, much appreciated.
Reply 207
Do we need to know transformations for this C2 exam??
Reply 208
Original post by Scorcher
What are the reasons for your estimations of the area under a curve being over/under using the trapezium rule?

June 09 4c I've got the answer as 6.133 which is correct but then it asks whether this is an over or under estimate and asks for a reason why. Never seen this question before and it's 2 marks so if anyone could help, much appreciated.
Can be either;
Composite_trapezoidal_rule_illustration.png

If they ask the graph will probably be fairly easy to draw, or it might even be provided already.
Reply 209
Original post by Scorcher
What are the reasons for your estimations of the area under a curve being over/under using the trapezium rule?

June 09 4c I've got the answer as 6.133 which is correct but then it asks whether this is an over or under estimate and asks for a reason why. Never seen this question before and it's 2 marks so if anyone could help, much appreciated.

||
Original post by Scorcher
What are the reasons for your estimations of the area under a curve being over/under using the trapezium rule?

June 09 4c I've got the answer as 6.133 which is correct but then it asks whether this is an over or under estimate and asks for a reason why. Never seen this question before and it's 2 marks so if anyone could help, much appreciated.


Think those above me have got you covered ;P But heres just a quick doodle of how it looks from question.
Original post by Wooden
Do we need to know transformations for this C2 exam??


Yeah. The 2012 January C2 one had a transformation question.
Reply 212
Original post by BaconFTW
Can be either;
Composite_trapezoidal_rule_illustration.png

If they ask the graph will probably be fairly easy to draw, or it might even be provided already.



Original post by Brad0440
||



Original post by gadzoinks
Think those above me have got you covered ;P But heres just a quick doodle of how it looks from question.


Thanks people! I understand it now :smile:
Reply 213
I am expecting a big GP question probably involving logs to solve. Also, get all over the proof as it hasn't been asked for a long time.

I am also expecting a difficult circles question.
Reply 214
It is worth reading through the last few C2 exam threads, see what the common errors were

Jan 2012

http://www.thestudentroom.co.uk/showthread.php?t=1892666


Revision thread

Contains past papers, boundaries, model answers etc

http://www.thestudentroom.co.uk/showthread.php?t=1619114
Reply 215
Original post by Arsey
I am expecting a big GP question probably involving logs to solve. Also, get all over the proof as it hasn't been asked for a long time.

I am also expecting a difficult circles question.


Can I ask a few questions?

(1) By big GP question do you mean something similar to the one found in June 2007 (http://www.thomas-reddington.com/uploads/7/7/8/3/778329/c2_qp_june_2007.pdf) [question 8]?
Though this isn't a difficult example, is this what you mean? A wordy question finishing with some log rearrangement?

(2) Which proofs do we need to know asides Sum of a geometric series for C2?

(3) Can I ask what kind of thing you'd expect to make a circles question difficult. Would it just require a knowledge of all the circle theorems?

Many thanks indeed!
Reply 216
Original post by dslc
Can I ask a few questions?

(1) By big GP question do you mean something similar to the one found in June 2007 (http://www.thomas-reddington.com/uploads/7/7/8/3/778329/c2_qp_june_2007.pdf) [question 8]?
Though this isn't a difficult example, is this what you mean? A wordy question finishing with some log rearrangement?

(2) Which proofs do we need to know asides Sum of a geometric series for C2?

(3) Can I ask what kind of thing you'd expect to make a circles question difficult. Would it just require a knowledge of all the circle theorems?

Many thanks indeed!


Yeah prob

Just that one

Just one that requires a bit of thought, knowledge of circle thms and trig
Reply 217
Original post by Arsey
Yeah prob

Just that one

Just one that requires a bit of thought, knowledge of circle thms and trig


Thanks a lot
Reply 218
why it gotta be hard @@ after setting a retarded s1 paper
Reply 219
Original post by dslc

(2) Which proofs do we need to know asides Sum of a geometric series for C2?


That is the only proof you need to know