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    I don't understand how they got number 1b.

    Question Paper: http://pmt.physicsandmathstutor.com/...%20Edexcel.pdf

    Mark Scheme: http://pmt.physicsandmathstutor.com/...%20Edexcel.pdf
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    (Original post by amelienine)
    I don't understand how they got number 1b.

    Question Paper: http://pmt.physicsandmathstutor.com/...%20Edexcel.pdf

    Mark Scheme: http://pmt.physicsandmathstutor.com/...%20Edexcel.pdf
    for 1 mark they probably just want you to sub in values
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    (Original post by amelienine)
    I don't understand how they got number 1b.

    Question Paper: http://pmt.physicsandmathstutor.com/...%20Edexcel.pdf

    Mark Scheme: http://pmt.physicsandmathstutor.com/...%20Edexcel.pdf
    The modulus means that the denominator will always be positive. This means that the RHS overall will always be positive therefore the LHS must always be positive as it is greater than RHS. So you have x+2>0 so x>-2 but from part one you know that the only inequality to suit this is x>1
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    (Original post by RDKGames)
    The modulus means that the denominator will always be positive. This means that the RHS overall will always be positive therefore the LHS must always be positive as it is greater than RHS. So you have x+2>0 so x>-2 but from part one you know that the only inequality to suit this is x>1
    oh i see now, thank you!
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    (Original post by amelienine)
    I don't understand how they got number 1b.

    Question Paper: http://pmt.physicsandmathstutor.com/...%20Edexcel.pdf

    Mark Scheme: http://pmt.physicsandmathstutor.com/...%20Edexcel.pdf
    hello, it is often easier to draw a graph of such problems. The solution is obvious after this
 
 
 
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