OCR MEI - FP1 - 14th May 2015

However, all mistakes that shouldn't lose you many marks. Thing is, I did the M2 paper yesterday (yeah I don't know why my school make us do M2 in Year 12 but can't do anything about it) and I got about 6 questions wrong. Yet I may only lose 6 marks, because they are mainly testing you on your understanding, so you'll hardly ever lose lots of marks for a little mistake because although you should lose some marks, they're not testing you on your ability to read from a graph. That was what GCSE's were for :P

Count yourself lucky, my school makes us do D1 and D2 in AS

If in the second part of Question 8 I just wrote down my answer as the same roots as the previous question (5+4i, 5-4i and -3) and misses out the 1 how many marks do you think I will lose?

Doesn't sound too bad then, hopefully I'll get the grades this year to help it make it easier for next year! What's S2 like then?

I'd imagine you'd just lose one or two marks.

As far as I can recall, question eight part four was about three marks, which were presumably for something along the lines of:

1) Showing that $\text{LHS} = z\left(f(z)\right)$ and $\text{RHS} = f(z)$.
Maybe also showing that $(z-1)f(z)=0$.

2) Giving the three roots of $f(z)$ from part three as solutions.

3) Giving $z=1$ as the fourth solution.

Does anyone think that not simplifying the fractions of $x$ and $y$ in question one (i.e. leaving them over $108$ ) will lose me a mark?
I'm obsessing over lost marks a bit but I'd imagine I only lost 3 or 4. I hope anyway.

I think it was just two marks? I doubt you'd get any marks for just writing the other 3 roots as they were the solution to the last question.

You won't lose any marks for not simplifying those fractions, the mark schemes allow 'equivalents'


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Count yourself lucky, my school makes us do D1 and D2 in AS

D2 is easier than M2, D1 is possibly the easiest ever module for me at least. I've never had a D1 lesson, but my friend (resitting year from different school) did last year and he explained the whole course in about 30 mins. D2 is a bit harder yes it's not easy, but defo easier for me than M2. However, I've always struggled with applied and found any sort of logic/ pure maths/ problem solving stuff easier tbh.

I suppose it just depends on how your mind works. I'm more into theoretical physics than computer science so mechanics is a lot easier for me than decision.

Any unoffical marks schemes out yet?

If in the second part of Question 8 I just wrote down my answer as the same roots as the previous question (5+4i, 5-4i and -3) and misses out the 1 how many marks do you think I will lose?

Haha it was a two mark question and I'd personally think you should lose 2 of them, but that's just me! You'll probs be lucky and just lose 1. I did the opposite! I worked out z=1 and left that as my answer, never crossed my mind to restate the same roots we literally stated 5 cm above tbh, badly worded question IMO. You'll most likely get 1/2 but I don't think people should get a mark for stating what they got marks for earlier!

From what I hear it's like M1 but with the inclusion of parameters you would otherwise discard, i.e. air resistance and friction while also having more difficult concepts to understand overall, as in what's happening physically may be harder to grasp the concept of.

Currently doing FP1, M1 and S2. Doing FP2, M2 and NM or D1 next year.

Unofficial Markscheme

1. $x = \dfrac{5}{18}, y = \dfrac{1}{27}$

2. $z_1 = 2 + 3j, z_2 = 2 - 3j[br][br]|z_1| = |z_2| = \sqrt{13}[br][br]arg(z_1) = 0.983, arg(z_2) = -0.983$

3. p = -12, q = 11, r = 20

4.

5i. Use standard summations.

ii. $k = \dfrac{1}{3}$

6. Run-of-the-mill proof by induction.

7i. Sketch:


ii. Values of x for which $y \geq 3$ are:
$x < 1, 3 \leq x < 2$

8i. $\alpha^2 = 9 + 40j, \alpha^3 = -115 + 236j$

ii. $q = -7, r = 123$

iii. $z = 5 + 4j, 5 - 4j$, or $-3$

iv. $z = 5 + 4j, 5 - 4j -3$ or $1$

9i. A'(0, 0), B'(-4, 0), C'(2, 12)

ii. Horizontal enlargement with s.f. 4, vertical enlargement with s.f.

iii. Area is 192 sq. units

That's all correct apart from 7ii, what was question 3 again?