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Lalana

  • 2 years ago

what is (-i)^3?

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  1. mathavraj
    • 2 years ago
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    i

  2. Spacelimbus
    • 2 years ago
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    -i \[ i^2 = -1 \] there if you multiply that by i you get \[ i^3= -i \]

  3. myko
    • 2 years ago
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    (-i)^3=(-i)^2 *i=-1*i=-i

  4. mathavraj
    • 2 years ago
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    you have to cube the minus also

  5. Spacelimbus
    • 2 years ago
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    -1 cubed is minus one.

  6. Spacelimbus
    • 2 years ago
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    http://www.wolframalpha.com/input/?i=i%5E%283%29

  7. mathavraj
    • 2 years ago
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    yes (-i)^3 is (-1*i)^3=-1*-i=i

  8. Spacelimbus
    • 2 years ago
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    why is i^3 now suddenly -i ? i^3 = i^3

  9. mathavraj
    • 2 years ago
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    i wrote exactly as in the question and got i as ans in ur link

  10. mathavraj
    • 2 years ago
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    because the question is,,

  11. Spacelimbus
    • 2 years ago
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    oh I see where you are going, thanks.

  12. Spacelimbus
    • 2 years ago
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    I should read the question more carefully. (-:

  13. mathavraj
    • 2 years ago
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    :)

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