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# Edexcel FP3 June 2015 - Official Thread watch

1. will I get a mark for finding an eigenvector?
2. (Original post by chermaine123)
will I get a mark for finding an eigenvector?
This is a bit vague?! Do you mean instead of the normalised eigenvector?!

Most likely for (b) you will, but you won't lose any if you normalised for (c), as this was required P was orthogonal
3. For vector question, if I use A as my position vector, is it wrong?
4. (Original post by chermaine123)
For vector question, if I use A as my position vector, is it wrong?
No! The line through AB is not unique - you could have used A/B as the 'jump-on' point or any other point on the line - therefore an infinite amount of solutions.

You could have had the 'unit of movement' to be any multiple of itself also
5. (Original post by Chazatthekeys)
No! The line through AB is not unique - you could have used A/B as the 'jump-on' point or any other point on the line - therefore an infinite amount of solutions.

You could have had the 'unit of movement' to be any multiple of itself also
Thanks!
6. (Original post by chermaine123)
Thanks!
No worries
7. what would 45/75 be in ums
8. So do people think the grade boundaries will be higher than last year?
9. (Original post by Emmi12345)
So do people think the grade boundaries will be higher than last year?
I honestly don't think they'll be as low as last years!
10. Unofficial Mark Scheme:

11. (Original post by physicsmaths)
Turns out 1 was right so i didnt forget to times by 1/2!

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Yay, one extra mark for us!
12. (Original post by Chazatthekeys)
I honestly don't think they'll be as low as last years!
Yeah, that's what I said! Are there any unofficial predicted boundaries floating around?
13. (Original post by Emmi12345)
Yeah, that's what I said! Are there any unofficial predicted boundaries floating around?
There might be back in the thread - the only way we'll know for sure is a few days before results day! aha
14. (Original post by Chazatthekeys)
There might be back in the thread - the only way we'll know for sure is a few days before results day! aha
Oh yeah... when are they posted, do you know? Is it the night before results day or something? haha
15. solutions to this year's FP3 in my "office"
http://www.thestudentroom.co.uk/show....php?t=3327325
Attached Images

16. (Original post by TeeEm)
solutions to this year's FP3 in my "office"
http://www.thestudentroom.co.uk/show....php?t=3327325
Cheers for the solutions
How many marks do you think I'd lose on 8a/8b if I accidentally used the wrong formula for finding the value of e/directrices/focii? (I used hyperbola instead if ellipse)

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17. HIIII guys..
Bit late to get here, but yestersday's paper was child ABUSE! hate it hate it!
18. why? what went wrong

CHILD ABUSE
19. Please be 59 for 90 ums!!
20. For Question 8B, I did the whole question using the general focus and ellipse equations and not using the exact value. Then, I ended up with 2a and subbed in my a = 2 at the end, would I still gain full credit?

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