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    (Original post by 10moxoma)
    what was the logs question?
    Find b in terms of a

    Solve 2^{2x+5} - 7(2^x) =0
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    (Original post by TheRandomGenius)
    Pretty sure 1c rounded to 1.602...
    I dont recall ever being asked to round numbers. it just says "state your answer to 1/2/3 decimal places" :/
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    (Original post by AstarAstarA)
    x
    Hiya! Is this for Edexcel?
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    (Original post by NotNotBatman)
    Find b in terms of a

    Solve 2^{2x+5} - 7(2^x) =0
    how do you rearrange in to find b in terms of a?
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    (Original post by AstarAstarA)
    Geometric:
    b) 256
    c) 1.601

    Binomial:
    A = 16
    k = 7/2
    B = 936

    Integration:
    S = 24.3

    Trapezium:
    a) 7
    b) 20.75
    c) R = 5.75

    Factor theorem:
    a) 5
    c) (x + 2)(3x + 2)(2x - 1)

    Differentiation(Q10):
    a) 1/3PIx^2
    d) Minimum = 120m
    c) x = 16.63... => f''(x) = 0.437 > 0

    Trig identities:
    a) Theta = 8/15Pi , -2/15Pi
    b) x = 194.5, 345.5

    Circle:
    a) root(34)
    c) 3x + 5x - 95 = 0

    Log:
    i) (a - 5)/9
    ii) -2.19

    Does anyone know how many marks the 'find K ' and 'find B' questions were for the binomial?
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    what did you have to plug in to the trapezium rule??
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    (Original post by KappaRoss)
    I dont recall ever being asked to round numbers. it just says "state your answer to 1/2/3 decimal places" :/
    And to do so would involve rounding. If you are giving your answer to 3dp you will have to round the last dp up or down.
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    (Original post by AstarAstarA)
    It was the difference between ar^9 and ar^10 wasn't it?
    a = 64
    r = 3/4

    Can someone confirm?
    is it not 1.602 to 2dp??
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    What is the first part of the log question? Can someone tell me the question and answer for it?
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    (Original post by TheRandomGenius)
    And to do so would involve rounding. If you are giving your answer to 3dp you will have to round the last dp up or down.
    **** if you're right then that's like -5 or more marks for me O_O
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    ahhh man i got the intergration question wrong i plugged in root3 instead of 9 will they do error carried forward or did i get the whole question wrong??

    thanks
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    (Original post by civ1)
    ahhh man i got the intergration question wrong i plugged in root3 instead of 9 will they do error carried forward or did i get the whole question wrong??

    thanks
    maybe one method mark
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    Did the second trig question in radians, still used identities and got it to cosx = 1/2 (I think) and solved but obviously my answer is in radians, reckon I'll drop many marks?
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    (Original post by civ1)
    ahhh man i got the intergration question wrong i plugged in root3 instead of 9 will they do error carried forward or did i get the whole question wrong??

    thanks
    It depends on the markscheme, but you might get the M (working) marks but not the A marks.
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    You lose no marks for putting dy/dx instead of dp/dx right??
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    (Original post by Nico52)
    Does anyone know how many marks the 'find K ' and 'find B' questions were for the binomial?
    2 marks each, so 4 in total. I know because that was the only question i knew i ****ed up at the time
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    (Original post by civ1)
    ahhh man i got the intergration question wrong i plugged in root3 instead of 9 will they do error carried forward or did i get the whole question wrong??

    thanks
    It seems like you went wrong with squaring

    x^(1/2) = 3

    This is basic algebra. If you square this equation you get x = 9. You moved across the power of a half and thought it meant to square root the other side. However, when you move from one side to another, it should do the reverse. The opposite of square root (^1/2) is to square
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    What was that on the log question about just solving mathematically or graphically?
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    (Original post by Matthew13)
    Did the second trig question in radians, still used identities and got it to cosx = 1/2 (I think) and solved but obviously my answer is in radians, reckon I'll drop many marks?
    Edexcel usually awards M marks for wrong mode on calculator but the process needs to be correct. However, you won't be able to get any answer marks.
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    (Original post by AstarAstarA)
    It seems like you went wrong with squaring

    x^(1/2) = 3

    This is basic algebra. If you square this equation you get x = 9. You moved across the power of a half and thought it meant to square root the other side. However, when you move from one side to another, it should do the reverse. The opposite of square root (^1/2) is to square
    yeah a really silly miststake. hiw many marks was the question. and how many will i lose do you think??
 
 
 
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