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Math Help - Simple Domain and Range

  1. #1
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    Simple Domain and Range

    hey all

    Im just starting computer science at uni, Whilst I can do calculas for some unknown reason I dont remember how to find the domain and range of

    y=1+sqrt(x)

    What I have gotten is

    D: >=1
    R: >=0

    Just not sure if that is correct
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Bastler View Post
    hey all

    Im just starting computer science at uni, Whilst I can do calculas for some unknown reason I dont remember how to find the domain and range of

    y=1+sqrt(x)

    What I have gotten is

    D: >=1
    R: >=0

    Just not sure if that is correct
    no.

    the domain of \sqrt{x} is x \ge 0. so that is the domain of your function

    the range of \sqrt{x} is y \ge 0. so, the range of 1 + \sqrt{x} is y \ge 1


    remember, the domain is the set of all input values (in this case, x-values) for our function. the range is the set of all output values (y-values) for which our function is defined.
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  3. #3
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    Quote Originally Posted by Jhevon View Post
    no.

    the domain of \sqrt{x} is x \ge 0. so that is the domain of your function

    the range of \sqrt{x} is y \ge 0. so, the range of 1 + \sqrt{x} is y \ge 1


    remember, the domain is the set of all input values (in this case, x-values) for our function. the range is the set of all output values (y-values) for which our function is defined.
    Yeh right i understand for some unknown reason I added the y value to the x value and got myself confused. Cheers mate
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