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# Arsey's S15 FP1 Model Answers (attached to 1st post) watch

1. i read the matrices question wrong instead of -20 i read 20 but my method is the same will i get some marks
2. For the last q.
i just multiplied sp and sq. will I get any marks?
3. (Original post by AQUF42)
Thanks a lot Arsey
Hope u can do the same with S3

Hopefully 100 UMS for my son
He thinks grade boundaries will be higher
Also he achieved early A* by getting
above 90% at AS
Bring on S3
Nerd of a son u got there then
4. Well he is very focussed
Hopefully he will be going to LSE to read straight economics
5. (Original post by Rkai01)
For the last q.
i just multiplied sp and sq. will I get any marks?
Probably 1.
6. For the induction question I ran out of time and didn't write the last conclusion step, I proved it was true for n=k+1 and stopped there. How many marks would I have lost ?
7. (Original post by LordIlyas)
For the induction question I ran out of time and didn't write the last conclusion step, I proved it was true for n=k+1 and stopped there. How many marks would I have lost ?
You'd only lose 1 mark. So you'd get 5/6

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8. Does anyone know how many marks I will lose for the proof by induction question?
For the matrix, proof by induction question I went straight from -1/4(5^k-1)-5^k, to -1/4(5^k+1 -1)
I did write the conclusion at the end.

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9. (Original post by Jelly150)
Does anyone know how many marks I will lose for the proof by induction question?
For the matrix, proof by induction question I went straight from -1/4(5^k-1)-5^k, to -1/4(5^k+1 -1)
I did write the conclusion at the end.

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Shouldn't lose one, but there's only one past question for matrices and it was worth 5, so I have no idea what the extra one is supposed to be for. I did the same thing as you, nonetheless.
10. Just realised that for the coordinates of R, I got fuddled and put (3(p+q),3pq) as the coordinates. In my working above you can clearly see me put x = 3pq and y= 3(p+q) and in past paper mark schemes, edexcel seem to vary a lot with the requirement for writing coordinates, so I don't know how many marks I've lost...
11. (Original post by OneOneFour)
Just realised that for the coordinates of R, I got fuddled and put (3(p+q),3pq) as the coordinates. In my working above you can clearly see me put x = 3pq and y= 3(p+q) and in past paper mark schemes, edexcel seem to vary a lot with the requirement for writing coordinates, so I don't know how many marks I've lost...
Probably 1

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12. (Original post by Mattematics)
Shouldn't lose one, but there's only one past question for matrices and it was worth 5, so I have no idea what the extra one is supposed to be for. I did the same thing as you, nonetheless.
I don't think we'll get the whole 6 marks.
If we're lucky, we'll get 5 if not 4.
I think you may get the 6th mark by showing how you get from -1/4(5^k-1)-5^k, to -1/4(5^k+1 -1)

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13. Do u have to put the coordinates for the matrix induction question to get full marks

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14. F1 solutions, very similar paper to FP1

http://www.thestudentroom.co.uk/show...5#post55854835
15. (Original post by Arsey)
F1 solutions, very similar paper to FP1

http://www.thestudentroom.co.uk/show...5#post55854835
I know you hate answering these questions but do you honestly think the FP1 paper could be less than 60 for an A like some people are suggesting?
16. (Original post by BBeyond)
I know you hate answering these questions but do you honestly think the FP1 paper could be less than 60 for an A like some people are suggesting?
I really cannot see it. Only once in the 11 papers has it been under 61, only twice under 62, for an A. It had a couple of tricky bits but it really wasn't that hard.

I'd randomly guess 62.

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17. (Original post by dandroff)
Do u have to put the coordinates for the matrix induction question to get full marks

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I don't think so

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18. (Original post by Arsey)
I really cannot see it. Only once in the 11 papers has it been under 61, only twice under 62, for an A. It had a couple of tricky bits but it really wasn't that hard.

I'd randomly guess 62.

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Ah was that June 13? How much harder was that then this paper if you can remember? cheers man
19. (Original post by Arsey)
I don't think so

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ok thank u arsey
20. For 8b) How many marks would i get for getting the correct tangents for both points P and Q, setting them equal but getting the coordinates incorrect?

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