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Annie96

  • one year ago

What is the domain of k(x)=sqrt(x+4? A. all real numbers greater than or equal to 4. B. all real numbers greater than 0. C. all real numbers. D. all real numbers greater than or equal to 0.

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  1. hartnn
    • one year ago
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    The quantity inside square root must be non-negative to get a real domain

  2. hartnn
    • one year ago
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    so solve for x in \(\Large x+4 \ge 0\)

  3. DanJS
    • one year ago
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    The domain are the possible values you can pick for X and get a Y value that makes sense

  4. DanJS
    • one year ago
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    real

  5. Annie96
    • one year ago
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    Domain: [−4,∞),{x|x≥−4} Range: [0,∞),{y|y≥0}

  6. hartnn
    • one year ago
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    yup thats correct

  7. Annie96
    • one year ago
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    so its a

  8. DanJS
    • one year ago
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    fancy, set , notation

  9. hartnn
    • one year ago
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    your option A should have a -4 instead of 4 there.

  10. DanJS
    • one year ago
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    yes the domain includes all the values possible for X that map to a value for Y

  11. Annie96
    • one year ago
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    Thanks you guys.

  12. DanJS
    • one year ago
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    y = root(x)|dw:1443162234484:dw|

  13. DanJS
    • one year ago
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    no values are to left of y=0, welcome

  14. DanJS
    • one year ago
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    x=0, sorry

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