Few things (Original post by Chittesh14)
I've updated the thread guys, bloody hell  that Latex took me over 1 hours lmao :'(.
don't necessarily have to be integers, they can be in(Original post by Chittesh14)
Equations of a straight line: y = mx + c or ax + by + c = 0 (a, b and c are integers).
Did you mean to say that the product of two gradients which are perpendicular to one another is 1? This does not make sense as it stands.The gradient of perpendicular lines is equal to 1.
What are ??
These two mean the same thing, you also need to comment that this is only true if
Other than that I will fix some LaTex here and there
Spoiler:Show
Basic laws and whatnot
 difference of two squares
Rationalising the denominator involving surds:
 use of the conjugate whereby the conjugate of is (important to note that the conjugate of is as some might get confused)
Quadratics:
(completing the square)
Solutions to are given by (quadratic formula)
The discriminant of the quadratic formula is and if:
no real roots
repeated real roots (or a single root)
2 distinct real roots
Equations of a straight line:
A line passing through and has equation where
Different forms include , and
Sequences:
The term of an arithmetic sequence, , with first term and common difference is given by
The sum of the first terms of an arithmetic sequence,, is given by where is the final term.
(NOTE: You seem to have misused the word series for a sequence. A sequence is a list of elements, and a series is the summation of these elements. When you say "sum of an arithmetic series" it does not make sense as you are not summing up sums.)
Basic Integration/Differentiation
If such that is a constant, then
If such that is a constant, then
If such that then where is a constant of integration.
If such that and is a constant, then where is a constant of integration.
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Edexcel Mathematics: Core C1 6663 17th May 2017 [Exam Discussion] watch

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RDKGames
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 17022017 00:51
Last edited by RDKGames; 17022017 at 01:08. 
Chittesh14
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 17022017 01:04
(Original post by RDKGames)
Few things 
don't necessarily have to be integers, they can be in
Did you mean to say that the product of two gradients which are perpendicular to one another is 1? This does not make sense as it stands.
What are ??
These two mean the same thing, you also need to comment that this is only true if
Other than that I will fix some LaTex here and there
Spoiler:Show
Basic laws and whatnot
 difference of two squares
Rationalising the denominator involving surds:
 use of the conjugate whereby the conjugate of is (important to note that the conjugate of is as some might get confused)
Quadratics:
(completing the square)
Solutions to are given by (quadratic formula)
The discriminant of the quadratic formula is and if:
no real roots
repeated real roots (or a single root)
2 distinct real roots
Equations of a straight line:
A line passing through and has equation where
Different forms include , and
Sequences:
The term of an arithmetic sequence, , with first term and common difference is given by
The sum of the first terms of an arithmetic sequence,, is given by where is the final term.
(NOTE: You seem to have misused the word series for a sequence. A sequence is a list of elements, and a series is the summation of these elements. When you say "sum of an arithmetic series" it does not make sense as you are not summing up sums.)
Basic Integration/Differentiation
If such that is a constant, then
If such that is a constant, then
If such that then where is a constant of integration.
If such that and is a constant, then where is a constant of integration.
Posted from TSR MobileLast edited by Chittesh14; 17022017 at 01:06. 
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 17022017 01:05
Edexcel has a formula booklet...

DFranklin
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 17022017 01:07

Chittesh14
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 17022017 01:07
(Original post by Zacken)
Edexcel has a formula booklet...
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Reshyna
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 20022017 08:19
(Original post by Chittesh14)
Welcome to the massive C1 preperation thread for Edexcel, though other exam boards or students can use it for practice. The reason why I didn't include OCR or other exam boards is because they usually have Edexcel C2 content in their C1 content.
This is the place to discuss, post problems, or ask any questions you may have regarding the exam!
If your post or question gets missed or no one replies to it, you can ask these people individually who are willing to help: Cryptokyo Zacken crashMATHS RDKGames B_9710 xzh
If anyone would like to be tagged in this thread (helpers) who are willing to help students with problems, can they please quote me and I'll tag them at the start of the post so people know who to tag if this thread ever becomes inactive.
In essence, I would really like students to post the most difficult questions they've encountered or tricky ones (with confusing wording) or ones that are not straightforward because these are the ones which often make a student panic  simply because they don't understand the content well enough or are unsure about how to answer the question due to its style.
CAN PEOPLE PLEASE POST LINKS TO REVISION RESOURCES OR ANY SPECIAL PAPERS THEY HAVE (EXCEPT EDEXCEL OR OTHER EXAM BOARDS C1 2016 FOR NOW) OR ANY MATERIALS THAT WOULD CONTRIBUTE TO THE THREAD. THANK YOU VERY MUCH!!
Edexcel C1 Exam Date  17 MAY 2017
Revision Resources:
Exam Solutions C1 Videos
Exam Solutions C1 Papers
crashMATHS Practice Papers (credit to crashMATHS )
Edexcel Alevel Maths Section (past papers, specification etc)
Various C1 resources
Various C2 resources
M4ths
Khan Academy (generalised, you have to search for topics)
Daily revision sheets for C1 (complete one per day, each sheet dated)
Maths videos by Jayates
MyMaths
MrBartonMaths C1
MrBartonMaths C2
Credit to Cryptokyo for this excellent resource, also attached in this post too.
All the formula/rules for Edexcel C1:
For rationalising surds, fractions in the form:
Discriminant (d) =
d < 0 = no real roots
d = 0 = equal roots
d > 0 = two real roots (distinct roots)
You should know the transformations of graphs.
Equations of a straight line: y = mx + c or ax + by + c = 0 (a, b and c are integers).
Parallel lines have the same gradient. The gradient of perpendicular lines is equal to 1.
Perpendicular lines have gradients 1/m.
Gradient of a line: m =  difference in y coordinates / difference in x coordinates
Equation of line formulae: y  y1 = m(xx1)
or
nth term of an arithmetic series = a + (n1)d
Sum of an arithmetic series = n/2[2a + (n1)d] or n/2[a+L]
where a is the first term, d is the common difference between the terms, n is the number of terms in the series and L is the last term in the series.
If y = , then dy/dx =
If y = , then dy/dx =
If dy/dx = , then y =
If dy/dx = , then y =
Difficult questions:
Layout:
Question 
Hint 
Solution  (if you want to provide it) as many people will post solutions eventually and there may be different solutions to the same question.
I'll be posting each question with a hint and solution in the spoiler so that students can attempt the question before looking at the answer. Just remember, if you directly look at the answer, you're only cheating yourself!
Coz I'm studying them and it's AS. To be more appropriate, I'm studying IALs so that makes it as C12, but could I join in, if you don't mind?
Coz the books are the same, aren't they? Only the exam dates differ. 
Notnek
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 20022017 09:11
(Original post by Reshyna)
Isn't C1 and C2 part of AS?
Coz I'm studying them and it's AS. To be more appropriate, I'm studying IALs so that makes it as C12, but could I join in, if you don't mind?
Coz the books are the same, aren't they? Only the exam dates differ.
And of course you're welcome to join in
For nonIAL students I recommend trying the C12 past papers if you're aiming for a high grade since they often have harder questions.Last edited by Notnek; 20022017 at 09:14. 
Reshyna
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 20022017 11:00
(Original post by notnek)
That was my fault  I changed the forum title for the OP but made a mistake. I've fixed it now.
And of course you're welcome to join in
For nonIAL students I recommend trying the C12 past papers if you're aiming for a high grade since they often have harder questions.
Thanks a lot!
Is practicing C1 and C2 papers beneficial for IAL students? 
Chittesh14
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 20022017 11:04
(Original post by Reshyna)
Oh, I see
Thanks a lot!
Is practicing C1 and C2 papers beneficial for IAL students?
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 20022017 12:24
PhysicsandMathsTutor http://www.physicsandmathstutor.com/
Provide Solomon Papers and Tiered Papers (Bronze, Silver and Gold  Being Hardest)
Solomon Papers are good for those which find past papers repetitive. I certainly find them useful!
Myself I'm resitting C1 and C2 as well! 
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 20022017 16:51
(Original post by B_9710)
Now this is probably an extension question since it uses limits that isn't really discussed anyway at AS. This also used C2 as well  binomial theorem. I think this is a decent question because it actually tells us what the derivative is by its definition.
,
. 
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 20022017 17:22
(Original post by _gcx)
First principles actually show up within the new specification, interestingly. 
TheAnxiousSloth
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 20022017 20:22
I'm in Year 13 and will be resitting C1 this year because I only got 78 UMS last year due to running out of time on the last two questions .
I'll be doing the IYGB papers for practice, which I haven't seen mentioned here yet but I highly recommend them!
http://www.madasmaths.com/archive_iy...ce_papers.html 
Chittesh14
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 20022017 23:03
I PROMISE TO UPDATE AND FIX EVERYTHING TOMORROW.
Too tired today :/
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 20022017 23:04
(Original post by LeCroissant)
I'm in Year 13 and will be resitting C1 this year because I only got 78 UMS last year due to running out of time on the last two questions .
I'll be doing the IYGB papers for practice, which I haven't seen mentioned here yet but I highly recommend them!
http://www.madasmaths.com/archive_iy...ce_papers.html
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Chittesh14
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 20022017 23:05
(Original post by LeCroissant)
I'm in Year 13 and will be resitting C1 this year because I only got 78 UMS last year due to running out of time on the last two questions .
I'll be doing the IYGB papers for practice, which I haven't seen mentioned here yet but I highly recommend them!
http://www.madasmaths.com/archive_iy...ce_papers.html
Posted from TSR Mobile 
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 20022017 23:15
lets do this!!!!!!!!

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 20022017 23:47
(Original post by Zacken)
I think it's very weird to introduce the definition of the derivative without even talking about what a limit means or what it means for a function to be differentiable and/or continuous. 
Chittesh14
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 21022017 22:30
RDKGames notnek I've updated the thread. I will update again properly in the weekend with proper difficult questions and C2 formulae, but I've done everything I need to .

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 23022017 23:09
Who knows how where i can get the 2016 paper? (edexcel)

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