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Shadly Group Title

Which of the following functions is the inverse also the function? I) f(x)= X^3 II) f(x)= X^4 III) f(x)= - |X| They're can be multiple answers because my choices are a. I and II only c. I, II, and III b. I only d. III only

  • one year ago
  • one year ago

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  1. amistre64 Group Title
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    also "a" function .. or also "the same" function?

    • one year ago
  2. Shadly Group Title
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    Also a function, lol sorry

    • one year ago
  3. amistre64 Group Title
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    odd degrees are functionable; even degrees need a restricted domain

    • one year ago
  4. amistre64 Group Title
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    |dw:1373401421696:dw|

    • one year ago
  5. amistre64 Group Title
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    |dw:1373401514303:dw|

    • one year ago
  6. tcarroll010 Group Title
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    Choice #3 inverse is not a function: x = -|y| -> x = -(-y) or -y -> x = y or -y 2 different values of y for each x except for at the origin.

    • one year ago
  7. Shadly Group Title
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    Okay, how do I figure out the other two?

    • one year ago
  8. tcarroll010 Group Title
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    Well, it looks to me like @amistre64 gave you great help on the first 2.

    • one year ago
  9. Shadly Group Title
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    I had no idea what she was doing

    • one year ago
  10. swissgirl Group Title
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    He is mister not a missus :P

    • one year ago
  11. tcarroll010 Group Title
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    The 2 graphs in each post show the function and the inverse to the right of it. A picture tells a thousand words.

    • one year ago
  12. amistre64 Group Title
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    graphwise .... -|x| is basically the same as -x^2

    • one year ago
  13. Shadly Group Title
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    I dont really understand the graphs... I know the third one isn't a function and I'm guessing the first isn't either...

    • one year ago
  14. amistre64 Group Title
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    do you know what a degree is?

    • one year ago
  15. Shadly Group Title
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    no

    • one year ago
  16. amistre64 Group Title
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    the exponent ...

    • one year ago
  17. amistre64 Group Title
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    x^(even) is not invertible without restricting its domain x^(odd) is invertible

    • one year ago
  18. Shadly Group Title
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    okay

    • one year ago
  19. Shadly Group Title
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    I think I got it thanks ^_^

    • one year ago
  20. amistre64 Group Title
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    good luck :)

    • one year ago
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