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    (Original post by AhnafR)
    How do you prove T is self inverse? Was detT = -1
    Yes, it was -1. You just had to find the inverse matrix and say that it was the same, i.e. R^-1 = R .'. self-inverse.
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    (Original post by anonymousGangsta)
    Both were 3 marks
    Lol dude they wernt 3 marks they were 5 marks each
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    (Original post by LewisClothier)
    awesome, i just saw someone put 2.03, but it's 2.23, i think they just remembered it wrong
    2.03 was the arg
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    (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
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    +-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
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    (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!
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    (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.
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    (Original post by Mills.O)
    You idiot that's for your postcode
    Whoops my bad!! , wish somebody had told me that
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    (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
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    (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?

    Attachment 535197
    can't remember however it was 11 marks for the whole of Q9
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    (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
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    (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
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    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
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    (Original post by anonymousGangsta)
    Whoops my bad!! , 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.
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    (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
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    For the last question, I got 5√2-5/2√2, not in the simplest form, is that ok?
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    (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
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    (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
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    Community Assistant
    For the last question, did it say the midpoint lied on the positive x axis or just that it was positive?
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    (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
 
 
 
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