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I know what the answer is just not how to exopress it. Can someone help me please?

State the domain of the function:


Now I know the domain is
(-infinity,3) U (3, infinity)?

(-infinity,3] U [3, infinity) ?
How do I express it? do I use ] brackets or open at the infinity and closed by the 3? i know x doesn't equal 3 so how do I show this in the answer? Thank you!

  • Algebra -

    uhh....i don't think ur cleer on wat ur saying

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