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Can this question come up on Edexcel GCSE Mathematics A? Watch

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    Hey,

    Can this type of exponential graph question come up on Edexcel GCSE Maths A?
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    (Original post by phat-chewbacca)
    Hey,

    Can this type of exponential graph question come up on Edexcel GCSE Maths A?
    Unlikely but it has i think???
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    (Original post by phat-chewbacca)
    Hey,

    Can this type of exponential graph question come up on Edexcel GCSE Maths A?
    not in the old gcse but in the new (1-9) yes
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    (Original post by Big Moisty)
    Unlikely but it has i think???
    Ahh, I really want it to come up tho!
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    (Original post by phat-chewbacca)
    Ahh, I really want it to come up tho!
    Because you know how to do it? ^-^
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    (Original post by phat-chewbacca)
    Hey,

    Can this type of exponential graph question come up on Edexcel GCSE Maths A?
    could you show the working out if you know the answer
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    That definitely won't come up
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    (Original post by theBranicAc)
    could you show the working out if you know the answer
    You just take the log of both sides, rearrange, and use simultaneous equations
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    (Original post by theBranicAc)
    could you show the working out if you know the answer
    substituting values from the graph into the equation:
    5 = p*q
    320 = p*q^4

    If you multiply the first equation by q^3 you will get the second equation.
    Therefore, 320/5 = q^3
    q^3 = 64

    the cubed root of 64 is 4, so q = 4.

    substituting this back into the first equation:

    5 = p * 4
    p = 1.25

    You can then check these values with the second equation to make sure
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    (Original post by surina16)
    substituting values from the graph into the equation:
    5 = p*q
    320 = p*q^4

    If you multiply the first equation by q^3 you will get the second equation.
    Therefore, 320/5 = q^3
    q^3 = 64

    the cubed root of 64 is 4, so q = 4.

    substituting this back into the first equation:

    5 = p * 4
    p = 1.25

    You can then check these values with the second equation to make sure
    oh okay I understand, could you help me with this please?
    http://www.thestudentroom.co.uk/show...5#post64727205
 
 
 
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