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anonymous

  • one year ago

Help! The function f(x)=1/((x^2)−4) is not defined at these x values:

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  1. anonymous
    • one year ago
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    \[f(x)= \frac{ 1 }{ x^2 - 4 }\]

  2. anonymous
    • one year ago
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    To solve this, you set the denominator equal to 0. Then you just solve for x.

  3. anonymous
    • one year ago
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    Then the x you get is the x value that is undefined.

  4. anonymous
    • one year ago
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    I got x= \[\sqrt{5}\]

  5. anonymous
    • one year ago
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    But it said it's wrong

  6. anonymous
    • one year ago
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    What minus 4 equals 0?

  7. anonymous
    • one year ago
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    x^2-4=0. Try solving for that. You should get two answers.

  8. anonymous
    • one year ago
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    plus or minus 2?

  9. anonymous
    • one year ago
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    Correct!

  10. anonymous
    • one year ago
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    Thanks!!!

  11. anonymous
    • one year ago
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    Yep! Good job!

  12. anonymous
    • one year ago
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    No problem, glad both sunny and I could help!

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spraguer (Moderator)
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