C1 Jan 2012 Edexcel - Post exam discussion - Solutions and paper in first post

This exam was just awful. I really hope the grade boundaries are low!

Reply 61

kanojyoxx

12

I'm sure you could either use the discriminant or try to actually factorise it using completing the square or the quadratic formula. I used completing the square and got x to be a negative square root, then I explained that it was impossible therefore there was no solutions. Something like this should be good enough.

Reply 62

Bright

11

Hated this paper!!!
How many bloody graphs were there in one paper?! MEH..

I'm glad it wasn't only me who thought it was hard..

:frown:

(edited 12 years ago)

Reply 63

Original post by Bright

Hated this paper!!!
How many bloody graphs were there in one paper?! MEH..

only 3. Most years there are 2/3. I think you are write that a lot more coordinate gemeotry came up but that means boundaries will be low.

Reply 64

mwdemon

Original post by otrivine

because when i applied the quadratic it was negative square root therefore maths error and i said that shows that the lines do not intersect

thats what i did. :biggrin:

Reply 65

arnab

11

Original post by Mr.cool

Personally this paper shouldn't have been hard. Its just edexcel do not make enough exams like this so people assume c1 is going to be easy and requiring no though.

yhhh thats very true! thats exactly what i was thinking last year, and then i ended up getting 56 for c1 nd 79 for c2 loool
learned my lesson!!

how hard do u think c2 was and what do u think grade boundary will be like?? i m guessing around 60 for an A?

Reply 66

Original post by arnab

yhhh thats very true! thats exactly what i was thinking last year, and then i ended up getting 56 for c1 nd 79 for c2 loool
learned my lesson!!

how hard do u think c2 was and what do u think grade boundary will be like?? i m guessing around 60 for an A?

C2 was easier than normal. C1 was harder than normal. C2 i guess A grade will be 63ish. C1 i guess A grade will be 56ish.

Reply 67

dan94adibi

I believe I got 93%.
**** how can I get question 2 b wrong. Method is right just the final answer.

Reply 68

mucgoo

8

Original post by otrivine

i solved it using quadratic forumula then stated that the line do not intersect ?

You need to prove they don't intersect by proving there no solution for the quadratic using the discriminant.

Reply 69

Folks

I got a lot of questions wrong, I'm praying on some method marks, ugh. :frown:

Reply 70

@Sean43

I dropped 10-15 marks on that damn paper :| anyone could predict my grade/ ums?

Reply 71

Doglamlico

16

From what I've seen, C2 was a tougher paper than last time (Summer 2011), and that time an A was 61-62. This time I'd expect it to be 58-60.

Reply 72

AtomicMan

13

Since some people found it hard, I'd say that maybe around 55 for an A?

Reply 73

Original post by @Sean43

I dropped 10-15 marks on that damn paper :| anyone could predict my grade/ ums?

You would definitely get an A. Mid eighties for UMS. 85-6

Reply 74

Original post by Junaid96

From what I've seen, C2 was a tougher paper than last time (Summer 2011), and that time an A was 61-62. This time I'd expect it to be 58-60.

Bare in mind this is the C1 thread. I also took C2 and personally there were no challenging questions. The only one that i could see of unfamiliar nature was 9b. Even then so it was only 4 marks and most people probably got it by trail and error as 2 and pie/5 are quite guessable answers.

Reply 75

otrivine

Original post by Mr.cool

You would definitely get an A. Mid eighties for UMS. 85-6

i think i got 56 is that A or not ?

Reply 76

dan94adibi

Original post by mucgoo

You need to prove they don't intersect by proving there no solution for the quadratic using the discriminant.

Yes you have to use b^2-4ac<0
but using the formula you should reach the same conclusion since you would have got negative number under the square root.

Reply 77

PR23

On 5) a)how many marks would you get if you made the two equations in to a quadtric then tryed to factorise them showing that they cant hence they do not intersect.

B) How many marks would you get if you skectch every thing right beside writing the point (-4/5,0)

Reply 78

Original post by otrivine

i think i got 56 is that A or not ?

touch and go i guess. I am sure you could more than make up in c3 if ur doing that also in Jan.

Reply 79