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    (Original post by Bude8)
    that's what I thought when I was shown this :lol:

    Hint: How many solutions does a linear equation have?
    A quadratic?
    A cubic?
    1, 2, 3
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    (Original post by L'Evil Fish)
    1, 2, 3
    So when we turned the quadratic into a cubic, we gave it another root.
    This is known as a 'spurious' root.

    spurious
    ˈspjʊərɪəs/
    adjective

    • 1.
      not being what it purports to be; false or fake.

    If you do maths at uni I think you'll learn about them
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    I'm doing: Music Technology (Edexcel), Psychology (Edexcel), Religious Studies (Ethics & Philosophy) (Edexcel) and Sociology (AQA).
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    (Original post by Bude8)
    So when we turned the quadratic into a cubic, we gave it another root.
    This is known as a 'spurious' root.

    spurious
    ˈspjʊərɪəs/
    adjective

    • 1.
      not being what it purports to be; false or fake.

    If you do maths at uni I think you'll learn about them
    Makes sense
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    Is anyone here doing the Chemistry Olympiad?
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    (Original post by Bude8)
    Is anyone here doing the Chemistry Olympiad?
    I am, thought I don't know anything :mad:
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    (Original post by Bude8)
    So when we turned the quadratic into a cubic, we gave it another root.
    This is known as a 'spurious' root.

    spurious
    ˈspjʊərɪəs/
    adjective

    • 1.
      not being what it purports to be; false or fake.

    If you do maths at uni I think you'll learn about them
    Whenever we see the spurious in lessons my maths teacher sings illuminate the spurious accentuate the positive...


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    (Original post by Bude8)
    How would you find the sum of the numbers that are divisible by 7 that are between 300 and 600?

    I got a series like:

    

u_1=301

u_n=301+7n

299=7n

n=42.7..

42 numbers within 300-600 that are divisible by 7
    then I used:
    S_{42} = \frac{42}{2} (2\times 301 + 41\times 7)

=18669
    However, the answer in the back is 19264... I tried with n=43, still didn't work. Any ideas?

    Btw formula for sum of n terms in an arithmetic series is
    S_n=\frac{n}{2} (2u_1 + (n-1)d)
    d=common difference, 7 in this case because it's multiples of 7...?
    

a = 301

d = 7

    

a_n = a + d(n-1)

a_n = 301 + 7(n-1)

595 = 301 + 7n - 7

301 = 7n

43 = n

    

s_n = \frac{n}{2} * (2a + d(n-1))

      = (43/2) * (602 + 301 - 7)

      = (43*896)/2

      = 38528/2

      = 19264

    In other words, you made a mistake somewhere when you were checking n = 43
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    (Original post by Bude8)
    Is anyone here doing the Chemistry Olympiad?
    I am doing the biology Olympiad tomorrow
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    Anyone doing OCR B Advancing Physics?
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    (Original post by Cantabcyte)
    Anyone doing OCR B Advancing Physics?
    Yup, unfortunately
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    (Original post by Nat_LPS)
    About the UK sutton trust summer camp this year, I'm not sure what they mean by transport is payed for to and from the summer school i.e the Universities. Is that actually from my country Wales to England/Scotland as that seems a little unlikely/hard to organise if for example there were two of us going to one of the Unis from one college... Anyone know anything?


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    I'm not too sure tbf but what I do know is that I've applied to the scheme too - I hope so though


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    (Original post by Bude8)
    Is anyone here doing the Chemistry Olympiad?
    Sadly no, but i may download the questions when they get released
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    (Original post by Leechayy)
    I'm not too sure tbf but what I do know is that I've applied to the scheme too - I hope so though


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    Ah it says its all taken care of in the brochure... cool, what uni/course did you apply for?
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    (Original post by Nat_LPS)
    Ah it says its all taken care of in the brochure... cool, what uni/course did you apply for?
    Cambridge/CompSci :')

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    (Original post by Leechayy)
    Cambridge/CompSci :')

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    They don't do straight CompSci, I take it you'll be applying for NST then?
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    (Original post by Bude8)
    They don't do straight CompSci, I take it you'll be applying for NST then?
    They do for the summer school, if I do get in to Cambridge when I consider applying next year (by some miracle tho...) I'd probably do CompSci with Physics as my overall choice

    It's weird though. Physics is that subject that picks up my biggest flaw but I really enjoy it. I've only started the A-Level in September too, is this weird? Surely you should only enjoy things you are good at? I'm not too sure:confused:
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    A*A*A, Cambridge's new offer that they'll be giving out. :O
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    (Original post by zed963)
    A*A*A, Cambridge's new offer that they'll be giving out. :O
    I was recently told this yesterday on a different thread - and it really bugged me out :mad:
    I wish I had more time my Maths and Further Maths are fine but my Physics and Economics (Physics more than Economics) aren't to par with that :/

    Ahh well, more of a reason to get up and do something about it
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    (Original post by zed963)
    A*A*A, Cambridge's new offer that they'll be giving out. :O
    Will this actually make much of a difference? I think the Telegraph article on this said that 9 out of 10 successful applicants for STEM/Medicine subjects (at Cambridge) got more than 1 A* anyway.
 
 
 
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