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Math Help - How does this change?

  1. #1
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    How does this change?

    3√-x-2
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  2. #2
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    Re: How does this change?

    Can you be more specific about what you mean by change?
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  3. #3
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    Re: How does this change?

    Functional transformation from
    Sqrt of x
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  4. #4
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    Re: How does this change?

    You are being very unclear about what you mean. Give the question in full and show what you tried already. I can only guess you are talking about a Fourier transform or a Laplace transform but you probably mean something entirely different because this is in Pre-University.
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  5. #5
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    Re: How does this change?

    Quote Originally Posted by Gragadoodle View Post
    Functional transformation from
    Sqrt of x
    So going from \sqrt{x} to \sqrt[3]{x- 2}?
    Going from x to x- 2 is a shift along the x-axis to the right, two places (x- 2= 0 when x= 2 so what used to be x= 0 has shifted to x= 2).

    I'm not sure I would consider going from \sqrt{x} to \sqrt[3]{x} a "functional transformation" in the usual sense of these problems (If it were 3\sqrt{x}, that would be a "stretch" by 3 times in the y direction) but it is, of course y to the 2/3 power: \left(\sqrt{x}\right)^{2/3}= \left(x^{1/2}\right)^{2/3}= x^{1/3}= \sqrt[3]{x}.
    Last edited by HallsofIvy; September 24th 2013 at 07:59 AM.
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  6. #6
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    Re: How does this change?

    From f(x)=sqrt of x
    To
    F(x)=3√-x-2

    Functional transformation
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  7. #7
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    Re: How does this change?

    Quote Originally Posted by Gragadoodle View Post
    From f(x)=sqrt of x
    To
    F(x)=3√-x-2

    Functional transformation
    It looks you are looking for a composition of functions. If that what it is then replace x in sqrt(x) by -9(x+2).
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  8. #8
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    Re: How does this change?

     F(x)=(-(f(x))^2-2)^{1/3}
    I'm guessing this is what the guy wanted to see. Please confirm, thanks.
    Last edited by chen09; September 24th 2013 at 01:01 PM.
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  9. #9
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    Re: How does this change?

    Quote Originally Posted by chen09 View Post
     F(x)=(-(f(x))^2-2)^{1/3}
    I'm guessing this is what the guy wanted to see. Please confirm, thanks.
    My guess is no better than your guess.
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  10. #10
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    Re: How does this change?

    We're all here to learn together in mathematics ( you can say mathematics is a way of life, lol). Don't have to say who's better or whatever that classifies people. =)
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  11. #11
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    Re: How does this change?

    Quote Originally Posted by chen09 View Post
    We're all here to learn together in mathematics ( you can say mathematics is a way of life, lol). Don't have to say who's better or whatever that classifies people. =)
    It is not who is better, it either guess is a guess.
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