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Math Help - Quick functions question...

  1. #1
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    Quick functions question...

    Find the range of values of x for which 10 - f(x) is positive.

    Could somebody tell me how to do this? I've already done the hard bit...

    Also, f(x) = (x-2)^2 + 1
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  2. #2
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    Re: Quick functions question...

    "Done the hard bit". Exactly which part is the hard bit?
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  3. #3
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    Re: Quick functions question...

    Just plunge f(x) in to 10-f(x) and solve for x
    10-((x-2)^2+ 1>0
    (x-2)^2<9
    -1<x<5
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