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Edexcel Core 3 - 21st June 2016 AM Watch

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    Put together an unofficial mark scheme, feel free to comment if I'm wrong anywhere
    http://www.thestudentroom.co.uk/show...7#post65974317
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    (Original post by blahblah21)
    Correct me if im wrong please (:
    are you sure that was the correct solution for y?

    i got y=-1/2x+29/2 not 35/2 like you did
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    (Original post by tammymxx)
    Edexcel wants beef
    No the chief examiner is a vegan
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    Can anyone remember the equation of Q3?
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    (Original post by pauux)
    Yeahh for the one with cot x
    Was this the one where it was like x < -5^1/2 , x > 5^1/2 ?
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    (Original post by mk_98)
    What did everyone get for the value of k (asymptote) on the graph. I got 21
    25 I think
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    (Original post by virufa)
    [if you'll pardon the pun]
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    (Original post by chloeabeki)
    i got 25, think i got 21 for the y intercept though?
    same god bless i got it right
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    (Original post by mk_98)
    What did everyone get for the value of k (asymptote) on the graph. I got 21
    I got 25
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    (Original post by apzoe)
    I found it ok. I had to skip some parts but returned at the end and did them all.

    Anyone remember exercise 4 last part? Where they ask to show that 1.437 is correct to 3dp. There was no sign change, just an intersection of the 2 graphs...
    there is
    put the two equations equal to each other then rearrange to make it equal to 0 then you can find a change in sign
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    (Original post by blahblah21)
    Q1a, x=6, x=-5
    b. a=6
    2a. dy/dx = (20-4x^2)/(x^2+5)^2
    b. x>rt(5) x<-rt(5)
    3a. rt(5)cos(theta +26.57)
    b. theta = 33.0, 273.9
    c. theta = 86.1
    4a. y=21, x=ln(2.5)
    y=25 (k=25)
    b. Proof
    c. x1= 1.4368
    x2= 1.4373
    d. Show the change in sign. (gradient function)
    5i. Turning points: 0.9463
    ii. 0.5cosec(4y)
    6a. A=3 B=4
    b. x+2y-35=0 (or equivalent)
    7a. arcsin(x) graph
    b. x= -(2+rt(3))/2
    8a. Proof
    b. x= 0.294, -1.277, 1.865 and 1 more I think
    9a. 6.740
    b. Proof
    c. T = 5ln(2+(2/e))
    From what i temembrr i got most of those
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    Ffs edexcel it wasn't that it was hard just too many questions that needed longer to work out, c4 is gonna be horrible


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    Honestly proofs involving tans and double angles are just time consuming. Like there are 39 identities to pick from
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    (Original post by tulipsinrain)
    sameeee
    Saaameee 😂
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    86.1

    (Original post by nahmed124)
    What was your smallest possible value for theata?
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    How did u lot get 33.something or whatever for the smallest possible value of x, im baffed for tht question, everything else was fine
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    (Original post by particlestudent)
    Please tell me someone used the quadratic formula for one if the trig ones -_-
    I completed the square but quadratic formula would work too.
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    (Original post by tayloryeah)
    LOVED IT! (except for some dodgy bits in the last question) will arsey be doing model answers this year?
    Nope, not anymore.
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    (Original post by ebolaboy)
    are you sure that was the correct solution for y?

    i got y=-1/2x+29/2 not 35/2 like you did
    Not too sure its one of the 2, because I remember seeing 32 and 3, so I think 1 of us just read the signs wrong, worst case one of us will lose 2 marks
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    (Original post by khaleesi98)
    We don't.
    Why don't we?
 
 
 
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