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Math Help - Discontinuities

  1. #1
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    Discontinuities

    find the X value if any at which f is not continuous.
    Which of the discontinuities are removable?

    f(x)= X^2-9
    Ok im not sure what im sopes to be doing here.
    I know X = 3 the back of the book says the answer is "Continuous for all real x". Can any one help explain the answer, and help me with a few more.
    Last edited by Nightasylum; September 7th 2009 at 05:19 PM.
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  2. #2
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    Quote Originally Posted by Nightasylum View Post
    .wysiwyg { BACKGROUND: #ffffff; FONT: 10pt verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; COLOR: #000000 } P { MARGIN: 0px } .inlineimg { VERTICAL-ALIGN: middle } find the X value if any at which f is not continuous.
    Which of the discontinuities are removable?

    f(x)= X^2-9
    Ok im not sure what im sopes to be doing here.
    I know X = 3 the back of the book says the answer is "Continuous for all real x". Can any one help explain why the answer, and help me with a few more.
    huh?
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  3. #3
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    Sorry about that not sure why it did that.
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