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anonymous

  • one year ago

Find the domain of the function: (I'll post it below)

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  1. anonymous
    • one year ago
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    |dw:1432741356266:dw|

  2. anonymous
    • one year ago
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    http://www.mathsisfun.com/sets/domain-range-codomain.html

  3. anonymous
    • one year ago
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    I know what is the definition of domain. I just need help in how to find it with the function that I posted.

  4. anonymous
    • one year ago
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    yes it has examples in the link

  5. anonymous
    • one year ago
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    well it doesn't give an example on how to find domain with 4th root functions

  6. anonymous
    • one year ago
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    @rational

  7. rational
    • one year ago
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    the stuff inside radical must be \(\ge 0\)

  8. rational
    • one year ago
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    \[\large 4-x^4~\ge~ 0\] solve \(x\)

  9. anonymous
    • one year ago
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    oh okay. |dw:1432741753251:dw|

  10. rational
    • one year ago
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    \[x^4~\le ~4 \] \[-\sqrt{2}\le x\le \sqrt{2}\]

  11. anonymous
    • one year ago
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    the book says the answer is \(\sf [- \sqrt{2}, \sqrt{2}]\) yes that will be right. But how did you get \( \sqrt{2}\)? Is 4th root of 4 sqrt of 2? how?

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