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Math Help - Domain of a function

  1. #1
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    Domain of a function

    Find the domain of a function

    f(x,y)=\sqrt{25-x^2-y^2}
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  2. #2
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    Quote Originally Posted by Apprentice123 View Post
    Find the domain of a function

    f(x,y)=\sqrt{25-x^2-y^2}
    Hint: Are square roots defined for all inputs, or only non-negative ones? What inequality does this suggest for the allowable input values for this function?
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