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    (Original post by blingaling)
    How do you estimate an approximate value in binomial expansion? For instance from the june 2013 reserve paper it asks estimate the approximate value of (7100)^1/3 using the binomial expansion of (8-9x)^1/3 ? I know you have to always sub in x=0.1 but how do you get this value?
    If x=0.1 the 8-9x = 7.1
    7100 is 7.1 x 1000
    so eqn becomes 7.1^1/3 x 1000^ 1/3 (and 1000^1/3 = 10)
    and take it from there
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    Hitler reacts to C4 June 2015....
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    (Original post by SkilledNChilled)
    Hitler reacts to C4 June 2015....
    He is dead
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    (Original post by Freddy-Francis)
    He is dead
    Do you even know of this meme?
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    (Original post by Freddy-Francis)
    He is dead
    He's still reacting to a lot of **** man, don't count him out just yet.
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    (Original post by SkilledNChilled)
    Do you even know of this meme?
    dude there is one for every exam now
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    Am i right in saying if i get completely stuck on part (a) of a question, and the next part of the question requires the answer for part (a) for you to continue, that i should just make an answer up and then i'd get some error carried forward marks?
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    I always find connecting rate of change and vectors difficult any tips?
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    please may edexcel have mercy on us.... please.. pretty pleeeaaaasseee...
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    (Original post by Kill3er)
    Am i right in saying if i get completely stuck on part (a) of a question, and the next part of the question requires the answer for part (a) for you to continue, that i should just make an answer up and then i'd get some error carried forward marks?
    To be honest, if it's a question which is hard enough to get stuck on, they make that part a 'show that', or occasionally give you a value to use in the next part if you are stuck. If somehow your situation came up, and you can find no alternative, then that'd probably be the best way to go, but they normally cover that.
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    (Original post by blingaling)
    How do you estimate an approximate value in binomial expansion? For instance from the june 2013 reserve paper it asks estimate the approximate value of (7100)^1/3 using the binomial expansion of (8-9x)^1/3 ? I know you have to always sub in x=0.1 but how do you get this value?
    (7.1)^1/3*(1000)^1/3
    (7.1)^1/3*10
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    (Original post by Star Light)
    To be honest, if it's a question which is hard enough to get stuck on, they make that part a 'show that', or occasionally give you a value to use in the next part if you are stuck. If somehow your situation came up, and you can find no alternative, then that'd probably be the best way to go, but they normally cover that.
    That's true, thanks
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    (Original post by Kill3er)
    That's true, thanks
    The only question type that I can think of where this could happen is in numerical methods... find x1, x2, and x3, and use that answer to find the solution to 3 decimal places or something. But since numerical methods is the easiest topic on the paper, they don't provide backups for this
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    Good luck everyone! hope the exam paper isn't as hard as c3
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    Thank you for your answers, but I meant how do you get the x=0.1? from all that to then sub it into the binomial expansion?
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    (Original post by tinkerbell55)
    I always find connecting rate of change and vectors difficult any tips?
    They can be hard, it's always a good idea to write out what you need, for example if you need to find dx/dt, that equals dx/dv * dv/dt, of course the v could be anything, but you'll always be given something to connect the v and x and the v and t, I know this isn't the best patch up but just try to always write out what you need...

    With the vectors, why not watch some of Examsolutions' videos on them?

    Good luck to everyone today
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    Exam is in a few hours.
    People already want Hitler react video.
    I'll go get my TARDIS
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    anyone else feel like they will never be prepared for this exam?
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    (Original post by tinkerbell55)
    I always find connecting rate of change and vectors difficult any tips?
    For vectors, always draw what you are given. Your eyes might take something that your brain can't and always try to make triangles if you are previously asked to find an angle.
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    (Original post by sophia_e)
    anyone else feel like they will never be prepared for this exam?
    More like I haven't had the time to prepare for this exam
 
 
 
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