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P1 help needed - differentiation!!! watch

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    hi, I have p1 edexcel tomorrow and I would really appreciate some help with this question. it's the november 2002 paper,3i) if anyone has it.

    differentiate with respect to x:

    2x^3 + x^0.5 + ((x^2 + 2x)/x^2)

    I understand how to differentiate it, but I don't understand how I can make the fraction into a form that I can differentiate. the mark scheme says divide: 1 + 2x^-1

    I don't understand.. could anyone help?
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    (Original post by jessica_h)
    hi, I have p1 edexcel tomorrow and I would really appreciate some help with this question. it's the november 2002 paper,3i) if anyone has it.

    differentiate with respect to x:

    2x^3 + x^0.5 + ((x^2 + 2x)/x^2)

    I understand how to differentiate it, but I don't understand how I can make the fraction into a form that I can differentiate. the mark scheme says divide: 1 + 2x^-1

    I don't understand.. could anyone help?
    well

    (x^2 + 2x) / x^2

    is the same as

    (x^2 / x^2) + (2x / x^2)

    which equals

    1 + 2x^-1
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    well the answer to the fractioned bit is

    -2x^-2

    and thats what i got before i differentiated?!?
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    (Original post by TheWolf)
    well

    (x^2 + 2x) / x^2

    is the same as

    (x^2 / x^2) + (2x / x^2)

    which equals

    1 + x^-1
    thank you SO much!!! it all makes so much sense..
 
 
 
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