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

1. (Original post by robinhood111)
for the matrices question how many marks do i lose if i only got 9/2 ???
It'll probably be one mark as the question specified finding the "values" so finding one value probably reduces the mark by one. I can't remember how many marks it was out of now though so it could also be two. I doubt it'll be more than that though.
2. (Original post by blurred)
For the divisible by 19 proof question I brought the 3^-2 down and multiplied f(k) by 27 then minused it from f(k+1) to eliminate the 3^k.I was able to prove it was divisible by 19 so would I still get full marks even if it's not the main method
I hope so as I went about it the same way
3. Did the same thing, pretty sure its fine my teacher at least told me so

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4. Does anyone remember the actual question for the divisibility proof by induction? I think it was 3 to the power something plus 2 to the power something, and it had to be divisible by 19.
5. (Original post by Charles Omer)
It'll probably be one mark as the question specified finding the "values" so finding one value probably reduces the mark by one. I can't remember how many marks it was out of now though so it could also be two. I doubt it'll be more than that though.
It was out of 5 marks :'((((((((((((((((((((
6. (Original post by cricketoo567)
Does anyone remember the actual question for the divisibility proof by induction? I think it was 3 to the power something plus 2 to the power something, and it had to be divisible by 19.
Hopefully this helps.
Am i the only one who forgot the sum for 2 to the power of r-1 from c2 so manually wrote out all 12 terms such mathematical elegance
apparently you wont get marks for this?
8. (Original post by robinhood111)
It was out of 5 marks :'((((((((((((((((((((
I'm guessing it'll be one or two marks. The working out will be worth three probably. Hopefully it's just one.
9. (Original post by KingsAlpaca)
1. ST 6.45
2. (3/10, 1/10
-2/5, 1/5)
(2,1
1,-4)
3. y=x/2 xy=16 (4sqrt(2), 2sqrt(2)) and (-4sqrt(2),-2sqrt(2))
4. (2p+12)/13 + (3p-8)i/13 p=20 lambda=+-4sqrt(5)
5. (12-5p, 4p-10
6p-15, 12-5p)
p=3/2 k=15/2 a=9/2 or -27/2
6. -3-2i a=2 b=-11
7. ST (-a, -3a/2) s=15a^2/16
8. ST k=2/9
9. ST ST

Hi do u know if I missed the answer a=-27/2 how many marks will I lose? Many thx
10. Can someone explain the matrix question for ii
11. (Original post by Apachai Hopachai)
I have a A*A*A university offer, should I hope that you guys got more than me or something?
What course and university is that for?
12. (Original post by Apachai Hopachai)
That may be true, but should I tell you another truth?

You failed that exam didn't you?
Nope my answers align with the markscheme except for one 3 marker which I would loose 2 marks on
13. Did u have to use a formula to work out the sum of 2^r-1 or is it fine if I just wrote the answer
Nope my answers align with the markscheme except for one 3 marker which I would loose 2 marks on
Then let's pray together that 100 UMS is 73 or higher
15. It's only people who are insecure feel the need to boast about there results to people they have never met. 👆🏿
16. (Original post by blurred)
Did u have to use a formula to work out the sum of 2^r-1 or is it fine if I just wrote the answer
You mean the sum formula?

Did you go through the tedious workings of (1 + 2 + 4 + ...) ?

If you did, you will get the marks
17. (Original post by Apachai Hopachai)
Then let's pray together that 100 UMS is 73 or higher
best of wishes on your offer .
18. (Original post by Apachai Hopachai)
Cambridge A*A*A 1,1

Warwick A*A*A 1

Imperial blah blah
how comes you're doing c1 this year if you're A2? doing maths fm physics and step in one year?
19. (Original post by Elliott M)
For the Area FXD question:
tangent has equation yq= x+ aq^2
at directrix, x= -a so yq = -a + aq^2 so y = (-a + aq^2)/q
F(a,0) X(-0.25a,0) D(-a, (-a + aq^2)/q)
Area of FXD = 1/2 x base x height = 0.5 x (a+0.25a) x modulus of ((aq^2 - a)/q)

Lets suppose the y coordinate of D is -5, length is 5, so times y coordinate of D by -1 to give magnitude.

Area = 0.5 x (1.25a) x ((a - aq^2)/q) = 0.625 x q^-1 x (a^2 - (a^2 x q^2))
I got it all in terms of q, as q is a parameter and everything in the question is algebra
I did the exact same you mate haha. Except from I found q=1/2. But didn't think it was a constant variable. Let's hope we get plenty of method marks
20. (Original post by Apachai Hopachai)
You mean the sum formula?

Did you go through the tedious workings of (1 + 2 + 4 + ...) ?

If you did, you will get the marks
Well I just put it into a calculator. Only took about 30 secs. I didn't write that out though. I just wrote the answer of around 4000

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