Mr M's OCR (not OCR MEI) Core 2 Answers May 2012 <strong><font

for the polynomial question with f(x) and g(x), i got 2 values for B, 3 and -3.
i got exactly the same answers as you though, would i lose marks for this?

I p

Can't believe I made such a stupid mistake! Most of the marks come from the working though so hopefully only lost at the most 2 marks

That isn't the correct way to do it. I suspect no marks but I could be wrong.

If i wrote for 9 part i, just -1 < y < 1 without converting it into logs or the real answer, do you think i'll get just one mark?


and for the question where you had to draw a sketch and explain about the trapezia, do you think i'll get any marks at all for drawing the sketch and trapezia and but writing that it was an overstimate as the tops of the trapezia are slightly above the curve.. ?

lol, wishful thinking

and for 7 part ii, i got totally the wrong answer, but would i get a method mark at all for recognising that you need to put sin sq x + cos sq x = 1, then subbing in sin and then sq rooting cos to find it, even though i got some totally random answer...

Doesn't that seem a bit silly though? Granted I didn't get the "exact" answer (I got a rounded answer), which was what the question specified, but are they allowed to dictate which is the 'correct' method? I was hoping to lose maybe 1 mark for having it rounded instead of in surd form.

Hi Mr M,

I just realised for 9b)(i) i put |log2y| < 1. (that's meant to be a modulus by the way, sorry if its unclear)

Then I put y<2. Could I potentially get the mark for showing I understood that it was meant to be 0.5<y<2 but not actually writing exactly that.

No one is believing me, but there is defiantly a printing error, in some of these papers, because most people who took the paper at my school defiantly had a "-", so they ended up with 1620x+1440x^3+64x^5, rather then what's on the unofficial Mark Scheme.

I am almost certain that on question 1 it asked for "(3+2x)^5 - (3-2x)^5" since I remember making the point of taking the negative value of each my "(3-2x)^5", and therefore got 1620x+1440x^3+64x^5. Also, when I went back to check my answers towards the end I would like to think I would have noticed that type of mistake, since it was something I preparing for during my revision (since it was a common mistake I used to make).

Just out of curiosity though, would there be any marks given for misreading the question (if it was in fact misread)? Just that I recall reading somewhere that if it was a genuine misreading, and didn't affect the difficulty (which I don't think it did) some marks would still be given.

Thank you very much

Definitely add - http://www.thestudentroom.co.uk/showthread.php?t=2003552&page=18

No it isn't silly. You didn't demonstrate the skills or knowledge required.

Isn't the knowledge required the same knowledge required to get the correct answer though?

Isn't the knowledge required the same knowledge required to get the correct answer though?

for question 3 i wrote the radian angle in a decimal place would i lose the mark and also for part two i used that decimal but i still i got 15 would i get 2 marks for that?