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

im just wondering if there is only 2 graph questions where you have the real co ordinate, say you draw the graph but only write 0 and 2 on the x axis and not the actual co ordinates would you loose a mark?

no that is still full mark

for the one where u have to show tht they dont intersect you have to equal the two equations together and they shouldnt equal by sub ing in x

I equated them and said it doesn't factorise, I hope that's sufficient.

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.

dont think your gonna get all the marks because a lot of equations cant be factorised thats when you have to use quadratic or completing the square, i completed the square and got a negative root but i carried on and never left a comment saying it cant be solved :/ hope i get all the marks though

Hi
With all due respect your assumption, along with others is somewhat optimistic.
I disagree that 100UM will be less than 70.

I appreciate students find the exam they have just sat the hardest of all time. 9/10 times thats because they were under pressure.

The paper was not straight forward but by no means a killer. There were some harder questiins but the start was very straight forward.

I think I will create two types of thread a pre-exam and post exam thread.

Pre-exam threads understandably need to be locked, but it seem to take ages for them to be unlocked.

Here are my model answers, written on the paper. I thought it was a hard paper in comparison to previous ones.

How did you find it?

Q1. Fairly standard calculus question. (6m)

Q2. Pretty easy Surds (6m)

Q3. Easy inequalities (6m)

Q4. Standard iteration sequences (6m)

Q5. a) unusual qu will cause probs (4m)

Q5. b) standard sketching (4m)

Q6. Coordinate geometry, not easy but fairly standard (7m)

Q7. Easy standard calculus question (5m)

Q8. Fairly tricky sketching / transforming question. First 5 marks were easy though. (10m)

Q9. Quite an odd AP question, lots of errors will be made on this qu (9m)

Q10. Calculus/Coordinate geometry again, this one will cause many probs too (11m)


So I do think it was a harder than normal paper but not stupidly hard. The first 24 marks should be bankers, I would say there were 40-45 pretty easy marks. So I would not expect very low boundaries.

Guessing boundaries is far from easy; Jan C1 boundaries are typically higher than those in June. More entries in June, more students retaking... only once has the boundary for an A dipped below 60 for an A in the past C1 Jan papers.

C1 Jan 11 was definitely easier and that was 62 for an A.

I am going to go for

100UMS = 73
90UMS = 66
80UMS = 59
70UMS = 52
60UMS = 45
50UMS = 38
40UMS = 31

The one with the translation, I didn't even know was a translation in the exam because I've never seen it in that form before FFS!

ure 1st answers wrong

Hi, for 9(b) I did the correct working for everything except I didn't multiply 1800 by 5, therefore getting the wrong value for T.

I then used this value in 9(c) using the same method as you but obviously got a different answer.

How much do you think I will be penalised for doing this?

Sorry if I double posted this but wanted to make sure it was in the right place.