Hey there! Sign in to join this conversationNew here? Join for free
    Offline

    0
    ReputationRep:
    (Original post by _Morsey_)
    If you're referring to the discriminant question, for the first part, since there were two equal roots, technically that means there must been one root (two the same), so i just did b^2 - 4ac = 0 which then proved the equation they wanted.

    For the second part, when they asked to disprove that there were two equal roots, i took the new equation and applied b^2 - 4ac to it again to get a negative answer. And since it was less than 0, it means there are no real roots.

    Seemed right to me, and answered everything they asked.
    Damm I didnt know you could do the B^2 -4ac twice!!! I hope I get 1 mark for it!
    Offline

    0
    ReputationRep:
    [ATTACH=CONFIG]215918 hey can someone help me with this? Jan 2013 C2
    Attached Images
     
    Offline

    0
    ReputationRep:
    [ATTACH=CONFIG]215918 hey can someone help me with this? Jan 2013 C2 q.4
    Offline

    0
    ReputationRep:
    (Original post by emzlynn)
    [ATTACH=CONFIG]215918 hey can someone help me with this? Jan 2013 C2
    a + (n-1)d.
    Sub in a=1 and d=4

    1+ (n-1) 4

    If you expan it

    4n-4+1.

    Which comes out as 4n-3


    .
    Offline

    0
    ReputationRep:
    (Original post by emzlynn)
    [ATTACH=CONFIG]215918 hey can someone help me with this? Jan 2013 C2
    I think for part b you write it back wards and then add them both. Like you do to find the proof of the nth term.


    .
    Offline

    0
    ReputationRep:
    (Original post by fil.sissay)
    I think for part b you write it back wards and then add them both. Like you do to find the proof of the nth term.


    .
    I meant for part a (ii)


    .
    Offline

    0
    ReputationRep:
    (Original post by emzlynn)
    [ATTACH=CONFIG]215918 hey can someone help me with this? Jan 2013 C2 q.4
    Did u get a?


    .
    Offline

    2
    ReputationRep:
    My maths teacher did the worked solutions for this paper shout if you need any other answers!

    Managed to get half of Q10 for the c1 paper this year, but kicking myself about the 2nd part of binomial expansion bit ahh well, roll on c2...

    Is anyone else doing s1 instead of m1?
    Attached Images
  1. File Type: pdf Jan 13 worked solutions.pdf (730.4 KB, 144 views)
    Offline

    0
    ReputationRep:
    (Original post by Isobelle)
    My maths teacher did the worked solutions for this paper shout if you need any other answers!

    Managed to get half of Q10 for the c1 paper this year, but kicking myself about the 2nd part of binomial expansion bit ahh well, roll on c2...

    Is anyone else doing s1 instead of m1?
    Am doing s1.


    .
    Offline

    0
    ReputationRep:
    How early did u guys start independent revision for all your exams?


    .
    Offline

    0
    ReputationRep:
    (Original post by Isobelle)
    My maths teacher did the worked solutions for this paper shout if you need any other answers!
    Thanks! Does anyone have a copy of the question paper (C2 - Jan 13) or just a list of the questions on the paper?
    Offline

    0
    ReputationRep:
    Guys, what is this topic called question 2 on the c2 paper.


    .
    Offline

    0
    ReputationRep:
    (Original post by Visvim)
    Thanks! Does anyone have a copy of the question paper (C2 - Jan 13) or just a list of the questions on the paper?
    Name:  ImageUploadedByStudent Room1368619430.713335.jpg
Views: 129
Size:  64.5 KB


    .
    Offline

    0
    ReputationRep:
    (Original post by Visvim)
    Thanks! Does anyone have a copy of the question paper (C2 - Jan 13) or just a list of the questions on the paper?
    Name:  ImageUploadedByStudent Room1368619508.743720.jpg
Views: 102
Size:  54.7 KB


    .
    Offline

    0
    ReputationRep:
    (Original post by Visvim)
    Thanks! Does anyone have a copy of the question paper (C2 - Jan 13) or just a list of the questions on the paper?
    Name:  ImageUploadedByStudent Room1368619553.975961.jpg
Views: 141
Size:  58.3 KB

    There u go.


    .
    Offline

    0
    ReputationRep:
    (Original post by fil.sissay)
    I think for part b you write it back wards and then add them both. Like you do to find the proof of the nth term.


    .
    Thankyou so much!!! Il have a look at it later and let you know
    Offline

    0
    ReputationRep:
    (Original post by Isobelle)
    My maths teacher did the worked solutions for this paper shout if you need any other answers!

    Managed to get half of Q10 for the c1 paper this year, but kicking myself about the 2nd part of binomial expansion bit ahh well, roll on c2...

    Is anyone else doing s1 instead of m1?
    Me
    Offline

    0
    ReputationRep:
    (Original post by fil.sissay)
    Name:  ImageUploadedByStudent Room1368619553.975961.jpg
Views: 141
Size:  58.3 KB

    There u go.


    .
    Thank you so much! I've been looking everywhere for it.
    Thanks!
    Offline

    0
    ReputationRep:
    Does anyone have the solutions for c1?
    Offline

    0
    ReputationRep:
    does anyone have the solutions for c1 may 2013?
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Brussels sprouts
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.