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Math Help - Domain and range

  1. #1
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    Exclamation Domain and range

    Question: Find the domain and range of the following

    1)  y=\sqrt{x^2+4}
    2)  y=\sqrt{9-x^2}

    Attempt:
    1)
    Domain : All real no.
    Range:  y>= 2

    2)
    Domain :  -3<=x<=3
    Range:  0<=x<=3
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  2. #2
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    Quote Originally Posted by mj.alawami View Post
    Question: Find the domain and range of the following

    1)  y=\sqrt{x^2+4}
    2)  y=\sqrt{9-x^2}

    Attempt:
    1)
    Domain : All real no.
    Range:  y>= 2

    2)
    Domain :  -3<=x<=3
    Range:  0<=x<=3
    Hi mj,

    Looks good!
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  3. #3
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    Quote Originally Posted by mj.alawami View Post
    Question: Find the domain and range of the following

    1)  y=\sqrt{x^2+4}
    2)  y=\sqrt{9-x^2}

    Attempt:
    1)
    Domain : All real no.
    Range:  y>= 2

    2)
    Domain :  -3<=x<=3
    Range:  0<=x<=3
    You mean, of course, 0\le y\le 3.
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