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Math Help - Finding the domain of a function in interval notation?

  1. #1
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    Finding the domain of a function in interval notation?

    [(sqrt(3x+12))/x ] - (1/x+3)



    I tried this question and got [-4,-3) U (0,infinity)
    it's not right though... what am i doing wrong?
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  2. #2
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    Quote Originally Posted by vecoma View Post
    [(sqrt(3x+12))/x ] - (1/x+3)



    I tried this question and got [-4,-3) U (0,infinity)
    it's not right though... what am i doing wrong?
    Since you do not show any working for how you got your answer, it is impossible to know what you're doing wrong.

    You require 3x + 12 \geq 0, excluding values of x for which x = 0 and x + 3 = 0 ....
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