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Edexcel FP1 Thread - 20th May, 2016

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Original post by anonymousGangsta
Both were 3 marks


Lol dude they wernt 3 marks they were 5 marks each
Original post by anonymousGangsta
Paper was p*ss, but the candidate number didn't have enough boxes for my mobile? Did they want that to text me my grade???


You idiot that's for your postcode
+-sqr2/2 (+-1/sqr2)
9/2*x^1/2 + 25/2*x^-3/2
12.467 (I double checked this however may still be wrong)
a=38 b=15 c=1
2-2i, -8i, p=-4 q=8
1/p
anti clockwise rotation 45 degree about (0,0) (this may be wrong)
p=-3 q=-9, matrix (0 1 (bottom line 1 0))
a^2 +2a -4 + 4i(a +1), a=-1, sqr5 and 2.03 rad, QR twice the length of OP and QR is parallel to OP
x=15sqr2/4
Original post by TH3-FL45H
2.03 was the arg


oh, yeah i got confused on that question so i put -2.03 in the heat of the moment, oopsy!
Original post by AhnafR
How do you prove T is self inverse? Was detT = -1


Basically a Matrix is self-inverse if A^2 = I so you had to times it by itself and get the identity matrix. Or at least I think.
(edited 7 years ago)
Original post by Mills.O
You idiot that's for your postcode


Whoops my bad!! :biggrin:, wish somebody had told me that
Original post by AhnafR
How do you prove T is self inverse? Was detT = -1


T^-1=T
or R^-1=R

Yes I got the determinent as -1 which gave T=T^-1
Original post by TH3-FL45H
Anyone remember how many marks the last two parts of 9 were worth?

Think I lost all them marks but got the rest the paper

For the first proof by induction is it alright if I didn't do the step shown in the pic?

1463740632449.jpg


can't remember however it was 11 marks for the whole of Q9
Original post by Person18
Does anyone know if there's an unofficial mark scheme? I know my teachers said they can't see it until tomorrow


Doubt it's up yet, check back in a few hours but it'll probably be here today
Original post by chewitt77
+-sqr2/2 (+-1/sqr2)

2-2i, -8i, p=-4 q=8

x=15sqr2/4


think i got -9 and -3 for p and q, not sure which way round though

Edit: oops... my memory is awful xD that was for the matrix question
(edited 7 years ago)
I thought the timing for this paper was quite tricky. I normally finish with about 30mins to go, but I spent all my time trying to get 5a, that I didn't have time to check1 So annoying
Original post by chewitt77
+-sqr2/2 (+-1/sqr2)
9/2*x^1/2 + 25/2*x^-3/2
12.467 (I double checked this however may still be wrong)
a=38 b=15 c=1
2-2i, -8i, p=-4 q=8
1/p
anti clockwise rotation 45 degree about (0,0) (this may be wrong)
p=-3 q=-9, matrix (0 1 (bottom line 1 0))
a^2 +2a -4 + 4i(a +1), a=-1, sqr5 and 2.03 rad, QR twice the length of OP and QR is parallel to OP
x=15sqr2/4


those are all right except the anti-clockwise rotation which was 135 degrees I believe
Original post by anonymousGangsta
Whoops my bad!! :biggrin:, wish somebody had told me that


MY friend found one question soo hard he put his paypal email address as the answer. Lol I saw him do it.
For the last question, I got 5√2－5/2√2, not in the simplest form, is that ok?
Original post by midgemeister7
those are all right except the anti-clockwise rotation which was 135 degrees I believe


Correct lol I used the formula book
Original post by Sallekmo
T^-1=T
or R^-1=R

Yes I got the determinent as -1 which gave T=T^-1


didn't know what self inverse meant, so i put ad = bc
For the last question, did it say the midpoint lied on the positive x axis or just that it was positive?
Original post by NotNotBatman
For the last question, did it say the midpoint lied on the positive x axis or just that it was positive?


Lied on the positive x axis so y=0
Dropped at least 2 marks, not too fussed though since the grade boundaries will probably be a bit lower than standard.
Don't think it was too tough though
Original post by NotNotBatman
For the last question, did it say the midpoint lied on the positive x axis or just that it was positive?


Positive x-axis

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