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# Edexcel Maths FP1 UNOFFICIAL Mark Scheme 19th May 2017 watch

1. donnaseemchandra
How are you feeling?
2. For the record, I noticed on an IAL paper that if you don't use the geometric progression formula from C2, you immediately lose 2 marks, they didn't accept simply plugging in numbers from 1 to 12
3. What were the 2 starting matrices in question 2 and how much was that question worth per part?
4. Also for the matrix question where it was AB +2A= kI, me and my friends got p=3/2, k=15/2
5. (Original post by Redcoats)

Sign change (-0.8888888 to 1.4149....)
alpha = 6.45
lambda = +- 4sqrt(5)
a = 9/2 or -27/2
Area (FXD) 15/16 a^2
D: (-a , -3/2 a)
Induction at the end (use assumption)
k = 2/9 for sum
other root: -3-2i
a = 2
b = -11 (or something like that)
y=x/2 xy=16 (4sqrt(2), 2sqrt(2)) and (-4sqrt(2),-2sqrt(2))
p = 20 somewhere

Anyone else remember?
agree with all ) hope we're on for 75/75
6. (Original post by arniethepie)
For the record, I noticed on an IAL paper that if you don't use the geometric progression formula from C2, you immediately lose 2 marks, they didn't accept simply plugging in numbers from 1 to 12
7. anyone else get a=5 , or a=-13
8. Redcoats, I have done questions separately if you want to order the OP.

I should be able to access the paper tomorrow, I've seen all the mark schemes so should be able to guess how the marks are structured once I've had a good luck.
9. (Original post by k.russell)
-27/2 because -27/2 x 2 + 9 = -18. The scale factor is absolute value of det m, so you need to find a such that det m = +/-18
ahh do you think you would get 3/5 for getting one solution?
10. These are my answers, looking for mild confirmation, here also are the marks:

1) This was a newton r

a) Prove root [6,7] Change of sign (2 marks)
b) Find first newton approx starting at 6 to 2dp , 6.45 (5 marks)

2) some matrix question:

(a) (2 marks)

(b) Given AB=P find B (3 marks)

3)
,
a) Find a line perpendicular to line between points and that goes through origin. Ans: (3 marks)
b) cart equation

c) Points of intersection and (3 marks)

4) Complex Numbers, horra.
i)
a) a+bi form : (3 marks)

b) p=20 (2 marks)
ii) ,

(2 marks)

5) i)
,
(a) Find AB (2)

find and
(b) ,

ii) I forget what the question was but and (5 marks)

6 (a) -2-3i (1)

(b) a=2 b=-11 (5 marks)
7 (a) (4 marks)
(b) (4 marks)
(c) (2 marks)

8) Proof involving sums:
(a) (5 marks)
(b) (4 marks)

9) two proofs questions, each worth 6 marks

Thanks To:
- @k.russell for 5 ii second answer
- @DystopiaisReal for 5 a, I put down the wrong sign
11. a=4.5,-13.5
k=2/9
p=1.5
k=7.5
12. (Original post by Nik298)
ahh do you think you would get 3/5 for getting one solution?
tbh I am not sure, I reckon that sounds fair though
13. (Original post by X_IDE_sidf)
These are my answers, looking for mild confirmation, here also are the marks:

1) This was a newton r

a) Prove root [6,7] Change of sign (2 marks)
b) Find first newton approx starting at 6 to 2dp , 6.45 (5 marks)

2) some matrix question:

(a) (2 marks)

(b) Given AB=P find B (3 marks)

3)
,
a) Find a line perpendicular to line between points and that goes through origin. Ans: (3 marks)
b) cart equation

c) Points of intersection and (3 marks)

4) Complex Numbers, horra.
i)
a) a+bi form : (3 marks)

b) p=20 (2 marks)
ii) ,

(2 marks)

what question was the p=20 one?
14. I ****ed up all the induction, could i still get some marks?
15. I had a wicked nosebleed round solving question 10 and it broke my concentration
Sooooo disappointing...
16. Do you guys remember the question about summations that led to k = 2/9.
18. Can you please do it for the k series question?
20. (Original post by 04MR17)
Question 2: Matrices
a.) 1 .(3. 1)
....10 (-4 2) [2]
b.) (2. 1)
.....(1 -4) [3]
The determinant was 10??? Oh ffs

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