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Math Help - Finding Nth Roots

  1. #1
    Senior Member vaironxxrd's Avatar
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    Finding Nth Roots

    I need to find the indicated real nth root(s) of a.

    I myself cannot understand the instructions well, as you guys know my English comprehending skills are not good at all.

    I have an example problem here.

    n = 2, a = 100;

    Would this be \sqrt[2]{100} ?

    = 10
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  2. #2
    Flow Master
    mr fantastic's Avatar
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    Re: Finding Nth Roots

    Quote Originally Posted by vaironxxrd View Post
    I need to find the indicated real nth root(s) of a.

    I myself cannot understand the instructions well, as you guys know my English comprehending skills are not good at all.

    I have an example problem here.

    n = 2, a = 100;

    Would this be \sqrt[2]{100} ?

    = 10
    Or -10 .....
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  3. #3
    Senior Member vaironxxrd's Avatar
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    Re: Finding Nth Roots

    Quote Originally Posted by mr fantastic View Post
    Or -10 .....
    or -10 indeed.

    I got a bit confuse with this other one.

    Problem:n = 6, a = -1

    \sqrt[6]{-1}

    = -1\sqrt{stuck}
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  4. #4
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    Re: Finding Nth Roots

    Quote Originally Posted by vaironxxrd View Post
    or -10 indeed.

    I got a bit confuse with this other one.

    Problem:n = 6, a = -1

    \sqrt[6]{-1}

    = -1\sqrt{stuck}
    There are no real roots. Do you know DeMoivre's Theorem? If not, there is no point in attempting this question. If so, then I suggest you go to your class notes or textbook and review how it is used for problems like this one.
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