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Math Help - Just need this clarified please.

  1. #1
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    Ontario Canada
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    Just need this clarified please.

    Hello,
    In my book it shows x=10(sqrt(1+4^4)-1)

    I am not sure about the -1 trying to figure out the velocity derivative.
    so its 10((1+4^4)^1/2-1)
    Is this how it will be written?? never seen it with a -1 at the end after a square root.
    So for the derivative it's
    5(1-4^4)^-1/2 -1????
    Is this correct. just wanting to see if I have it correct before proceeding further.
    Thanks
    Joanne
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  2. #2
    MHF Contributor
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    Quote Originally Posted by bradycat View Post
    Hello,
    In my book it shows x=10(sqrt(1+4^4)-1)

    I am not sure about the -1 trying to figure out the velocity derivative.
    so its 10((1+4^4)^1/2-1)
    Is this how it will be written?? never seen it with a -1 at the end after a square root.
    So for the derivative it's
    5(1-4^4)^-1/2 -1????
    Is this correct. just wanting to see if I have it correct before proceeding further.
    Thanks
    Joanne
    If you take the derivative of a constant, you get 0 and 10(sqrt(1+4^4)-1) is just a number.

    Can you type out the problem you were given verbatim?
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