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# Edexcel Mathematics: Core C1 6663 17th May 2017 [Exam Discussion] watch

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1. (Original post by geokid1)
Attachment 647442 Any one know how to do Q11 C? Thank You!
C and B are both parallel, so B and C have the same grad. Use the grad from the equation of the tangent u calculated in B and set the = to the derivative of the curve(a). You will then get a quadratic with 2 answers for x, the one you know and another x cordinate. Put this into the equation of curve to get y coordinate to get coordinates
2. how do you do this question

It is Q7 Practice Paper C of: http://crashmaths.com/a-level-practice-papers/

if i integrate the expression I get,

cx^3 - cx^2 + sqrt(c) + (2x^(3/2))/3 + c

and if i sub everything in, i get a different value of c???
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3. Thank You my friend. Much love!
(Original post by AchR)
C and B are both parallel, so B and C have the same grad. Use the grad from the equation of the tangent u calculated in B and set the = to the derivative of the curve(a). You will then get a quadratic with 2 answers for x, the one you know and another x cordinate. Put this into the equation of curve to get y coordinate to get coordinates
4. (Original post by needsomehelpnow)
how do you do this question

It is Q7 Practice Paper C of: http://crashmaths.com/a-level-practice-papers/

if i integrate the expression I get,

cx^3 - cx^2 + sqrt(c) + (2x^(3/2))/3 + c

and if i sub everything in, i get a different value of c???
Because you integrated incorrectly.
5. (Original post by needsomehelpnow)
how do you do this question

It is Q7 Practice Paper C of: http://crashmaths.com/a-level-practice-papers/

if i integrate the expression I get,

cx^3 - cx^2 + sqrt(c) + (2x^(3/2))/3 + c

and if i sub everything in, i get a different value of c???
Hi when i integrate the expression i get f(x)= cx^3 - cx^2 + 2sqrt(c)x^(3/2)/3 + c
when you sub in the coordinate (0,1) all the x terms cancel and youll be left with c=1
6. (Original post by needsomehelpnow)
how do you do this question

It is Q7 Practice Paper C of: http://crashmaths.com/a-level-practice-papers/

if i integrate the expression I get,

cx^3 - cx^2 + sqrt(c) + (2x^(3/2))/3 + c

and if i sub everything in, i get a different value of c???
(Original post by RDKGames)
Because you integrated incorrectly.
(Original post by t.wilson123)
Hi when i integrate the expression i get f(x)= cx^3 - cx^2 + 2sqrt(c)x^(3/2)/3 + c
when you sub in the coordinate (0,1) all the x terms cancel and youll be left with c=1
You shouldn't use c for the constant. There is no indication that the constant of integration is the same c as in the question.
7. (Original post by igotnomoney)
Can you guys tell me the hardest core 1 paper in edexcel exam board I'm an aqa exam board student
probably the 2016 exam
8. How do you find an equation of a line perpendicular to another line without being given any coordinates to work with???
9. (Original post by needsomehelpnow)
how do you do this question

It is Q7 Practice Paper C of: http://crashmaths.com/a-level-practice-papers/

if i integrate the expression I get,

cx^3 - cx^2 + sqrt(c) + (2x^(3/2))/3 + c

and if i sub everything in, i get a different value of c???
I didn't wanna type it so I wrote it out for you.

10. (Original post by aggressively)
How do you find an equation of a line perpendicular to another line without being given any coordinates to work with???
Difficult to help without being given the full question
11. (Original post by aggressively)
How do you find an equation of a line perpendicular to another line without being given any coordinates to work with???
Can I see the question?
12. (Original post by jb10101)
I didn't wanna type it so I wrote it out for you.

Thanks for that, what about b? Would you mind doing a working of that too?
13. (Original post by needsomehelpnow)
how do you do this question

It is Q7 Practice Paper C of: http://crashmaths.com/a-level-practice-papers/

if i integrate the expression I get,

cx^3 - cx^2 + sqrt(c) + (2x^(3/2))/3 + c

and if i sub everything in, i get a different value of c???
When integrating it, put it into a form when it can be integrated. Put the x in terms of indices, so sqrt c x^1/2 or c^1/2x^1/2 and then integrate the x.
14. (Original post by Kevin De Bruyne)
Difficult to help without being given the full question
The line l₁ has equation 3x - 2y + 10 = 0(a) Find the gradient of l₁.1The line l₁ crosses the x-axis at the point A and the y-axis at the point B, as shown in the diagram above.The line l₂ is perpendicular to l₁ and passes through B.(b) Find the equation of l₂
Attached Files
15. gradient lines.docx (154.0 KB, 35 views)
16. (Original post by jb10101)
Can I see the question?

The line l₁ has equation 3x - 2y + 10 = 0(a) Find the gradient of l₁.1The line l₁ crosses the x-axis at the point A and the y-axis at the point B, as shown in the diagram above.The line l₂ is perpendicular to l₁ and passes through B.(b) Find the equation of l₂
17. (Original post by aggressively)
The line l₁ has equation 3x - 2y + 10 = 0(a) Find the gradient of l₁.1The line l₁ crosses the x-axis at the point A and the y-axis at the point B, as shown in the diagram above.The line l₂ is perpendicular to l₁ and passes through B.(b) Find the equation of l₂
You're told l2 passes through B and l1 passes through B so you can find the point B which u can use as coordinate for l2
(Original post by JaimeJamerson)

C1 Maths only has 8 chapters...yea do understand - bio and chem are harder...you mean you paid to do as an extra candidate at your school for the exam?
I've been entered in but there was no space to teach in our sixth form, I just got in for chemistry and biology...
Just finished the 14 "sections". 8.1,8.2,8.3 etc, thats how it was laid out :P
You're told l2 passes through B and l1 passes through B so you can find the point B which u can use as coordinate for l2
How do you find point B though?
20. (Original post by aggressively)
How do you find point B though?
find the point where l1 hits the y axis (set x as 0)
21. (Original post by NRose12)
who thinks proof for sum of arithmetic series will come up?
just learn it lol

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