Edexcel June 2016 FP2 UK (and IAL) Solutions

'Yes, I used $\alpha$ myself. No marks dropped.'

If I did this but didn't state alpha = arccos(3/4) even though I worked that out in part a, how many marks would I lose?

Whoops, missed this. You shouldn't lose any marks if it's clear that you know what the limits are, if not, drop 1 mark. (or 2, if the examiner is being strict)

hey man for the second cordinate of the polar question, i did 2 pie - theta. That is still correct right?

Nopes, because the range was specified as -pi, pi or whatever it was. Drop a mark.

Nopes, because the range was specified as -pi, pi or whatever it was. Drop a mark.

also what do you think are the predicted grade boundaries for this test for 90ums?

also what do you think are the predicted grade boundaries for this test for 90ums?

He previously said he thinks it will be 68, maybe 67.
I think 67, maybe 66 (unlikely)

No one can predict these things. Best to focus on your remaining exams.
Good luck

ah okay thank you but could you help me?

I may have made an error in the series question but the method was correct, how many marks would i lose? like i think i may have made an arithmetic error idk also for the question 4 i got to where we had to integerate it using chain rule.

Series as in method of differences or the tanx in powers of x-pi/4 question?

For 4ai I didn't see that there were things to sub in, would that be 2 marks? How do you think the M and A marks were allocated for 4ai? I lost three elsewhere on stupid mistakes sigh, praying for an A*

@Zacken , you know your answer for 4 (ii), would we get the same answer if we use integration method (first order)?
Because I tried it now and some how I got the very similar answer, but my coefficient became 1/3. (Everything inside the bracket is the same I believe)

So maybe when you get time could you show me the first order method to get this solution. Thanks. (No rush though, whenever you get time)

method of differences question, I think I may have made an arithmetic mistake so i got what the n/2(n+2) + n(n+1)/2 - 3n

-2 maybe

Could you show me your work?

I think 73 for full, particularly since the first order diff eqn seemed to have tripped up many people. The rest of it seemed doable, with part Bs having a 'show that' question which confirms your answer to part A. Thoughts?