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vera_ewing

  • one year ago

Determine the domain of the function.

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  1. vera_ewing
    • one year ago
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  2. anonymous
    • one year ago
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    D

  3. vera_ewing
    • one year ago
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    @welshfella Is D correct?

  4. Elsa213
    • one year ago
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    i think it's D. :o

  5. confluxepic
    • one year ago
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    The domain is all the values of x.

  6. Hero
    • one year ago
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    @confluxepic it can't be all values of x because x is in the denominator.

  7. Hero
    • one year ago
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    @vera_ewing it's not B

  8. vera_ewing
    • one year ago
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    Would it be A?

  9. Hero
    • one year ago
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    Try to figure out ALL of the values of x that are not in the domain.

  10. vera_ewing
    • one year ago
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    So then it's D? That was my first choice.

  11. Hero
    • one year ago
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    Sorry I didn't see your first choice. I only saw B.

  12. Hero
    • one year ago
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    D is correct.

  13. phi
    • one year ago
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    you should be more certain. the way you know the answer is remember NO divide by zero some values for x will cause the bottom to be zero, and we do not allow those

  14. vera_ewing
    • one year ago
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    Thank you.

  15. vera_ewing
    • one year ago
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    All right, @phi Thanks.

  16. Hero
    • one year ago
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    @vera_ewing I agree with @phi. If someone challenges any answer you choose, you should be ready to defend your answer.

  17. phi
    • one year ago
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    notice if x=0 you would get 0* (0-81) = 0*-81 = 0 and the bottom would be 0, and that is bad. so you should look for choices that say \( x\ne 0\)

  18. vera_ewing
    • one year ago
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    Thanks so much, @phi and @Hero

  19. confluxepic
    • one year ago
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    Yes @hero I was just stating the definition of the domain to help the asker understand. I guess it would have been clearer if I added "possible" to the definition to make it more accurate.

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