Arsey's S15 FP2 Model answers (in first post)Watch this thread
for Q2c I did w=z^(3/4), and I only get 2 root 2 i as my answer. How many marks will I get?
in june 2010, they got a similar question and the mark scheme is like that :
Q7c - may have gotten the wrong term in the last part of the series but the differentiation was correct.
Q8b- didn't work out the second part of the PI and just added u over 8
How many marks do you think those mistake cost me?
I couldn't integrate the 3sinxcos2x so had to make:
y= integ(3sinxcos2x)/sinx + C/sinx
I expect 3/6 for that based on previous questions since I got the I.F etc.
I couldn't show the method of differences question, I'm hoping for 1/4 here.
I made a mistake with the last question where e^pu I used -4 rather than 4, giving an end answer of x^-4 etc. I assume this is 3 marks gone too, 2 in part B and 1 in part C (if no carry through, it was only 1 mark). (I guess they might not even noticed.. optimistically).
Finally I for the polar equation I got a^2(9/4+9rt(3)/2) so my coef of B was wrong. I assume this is another 2 marks gone.
In total a ****ty result for me, looking at 64 raw marks. I'm guessing that's about 80 UMS :/
And what are standard boundaries?
For the roots question I ended up with 2+/-2i and -2+/-2i I have no idea why, any idea how many marks this will be worth?
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Edit: i realised that if i expanded mine i would've got the right answer, how many marks will i lose for this?
Also, for 7c I worked out all the correct values for f(pi/4) but I can't remember if I got 176/3root3....so I'm not sure I got the expansion correct. How many marks would I lose?