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# Edexcel FP3 June 2015 - Official Thread watch

1. (Original post by Elcor)
No. 2 and 2+/-root2
Yeah, getting them in surds put me off and I wasted my time checking it thrice because I thought they wouldn't do that for some reason... At least I got the surds though.
2. (Original post by aero-1997)
Literally the worst exam experience ever lol, i cant believe i flopped the paper so badly for some reason i also got 1,2,3 as the eigenvalues and couldnt even do the stupid last question and messed up on part b for the reduction formulae so maybe only got maximum 52 ish marks, hopefully I will get at least a B for this paper but thats not too bad I just need an A overall for Further Maths.
If it helps I got 1,2,3 too ((((((((((
3. The answers for eigen values were definately 2,2+-root2

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4. I did one eigen vector wrong , how much would I lose , and the next q
5. (Original post by physicsmaths)
Yh i spent 30 minutes on this quest hinking i had gone wrong. If i moved on at first i couldve finished the last 6 marker 😂

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You should learn to trust your maths
6. (Original post by chemlover12)
Did you guys apply the + - + rule?
That's nothing to do with M=PDP(-1) that's to do with cofactors and finding inverse matrices

You only had to find P such that it was orthogonal, but they made you find the normalised eigenvectors before anyway!
7. (Original post by Elcor)
You should learn to trust your maths
I should not 😂. I will not after my disasterous factorisation in FP2 haha.

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8. what was right hand side for the vector equation?
9. (Original post by jelo)
what was right hand side for the vector equation?
I got -3
10. What did everyone else get for Q1...?
11. (Original post by Emmi12345)
What did everyone else get for Q1...?
Ln(1+-root2) and ln(golden ratio)

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12. (Original post by Emmi12345)
What did everyone else get for Q1...?
sinh x= 1/2 and something I cant remember
13. (Original post by physicsmaths)
Ln(1+-root2) and ln(golden ratio)

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It wasn't 1-sqrt(2) since sinh(x) = 1/2 only has one solution at x=ln(1+sqrt(2))
14. (Original post by Chazatthekeys)
That's nothing to do with M=PDP(-1) that's to do with cofactors and finding inverse matrices

You only had to find P such that it was orthogonal, but they made you find the normalised eigenvectors before anyway!
Oh ffs. I just want to see the paper again.
15. Wow that was tough! Do you reckon it was as hard as last years? If so, do you reckon grade boundaries will be similar? It was 62 for an A* last year...
16. (Original post by physicsmaths)
Ln(1+-root2) and ln(golden ratio)

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I saw that too happy little surprise
phi ftw
17. (Original post by physicsmaths)
Ln(1+-root2) and ln(golden ratio)

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Wasn't it just 1+root2 because 1-root2 < 0?
18. (Original post by ThatPerson)
Wasn't it just 1+root2 because 1-root2 < 0?
Yhhhh. Im just remmeber the inverse of the e^x prts.

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19. (Original post by jelo)
sinh x= 1/2 and something I cant remember
sinh(x)=1 also
20. does FP3 have to count towards the A*? I also did FP2, M2, S2 this year so can I get the A* with those three or does there have to be a level3 module (eg FP3/M3) in there?

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