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Math Help - domain and range of function

  1. #1
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    domain and range of function

    Hello, i need help with this question: domain and range of:

    f(x) = square root of 8-3x sqaured.

    Your help would be highly appreciated.
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  2. #2
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    Quote Originally Posted by unit_01 View Post
    Hello, i need help with this question: domain and range of:

    f(x) = square root of 8-3x sqaured.

    Your help would be highly appreciated.
    f(x) = \sqrt{8 - 3x^2}

    For the domain, where is 8 - 3x^2 negative?

    For the range, what is the smallest value the square root function can have? What is the largest? (In the given domain.)

    -Dan
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  3. #3
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    hello

    For the domain, where is 8 - 3x^2 negative?

    For the range, what is the smallest value the square root function can have? What is the largest? (In the given domain.)

    what do u mean by that? like when can 8-3x^2 be negative?
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  4. #4
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by unit_01 View Post
    hello

    For the domain, where is 8 - 3x^2 negative?

    For the range, what is the smallest value the square root function can have? What is the largest? (In the given domain.)

    what do u mean by that? like when can 8-3x^2 be negative?
    An number under the square root sign cannot be negative. So if 8 - 3x^2 is negative, then it can't be in the domain.

    -Dan
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