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Lalana

what is (-i)^3?

  • one year ago
  • one year ago

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  1. mathavraj
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    i

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

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

    • one year ago
  4. mathavraj
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    you have to cube the minus also

    • one year ago
  5. Spacelimbus
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    -1 cubed is minus one.

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

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

    • one year ago
  8. Spacelimbus
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    why is i^3 now suddenly -i ? i^3 = i^3

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

    • one year ago
  10. mathavraj
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    because the question is,,

    • one year ago
  11. Spacelimbus
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    oh I see where you are going, thanks.

    • one year ago
  12. Spacelimbus
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    I should read the question more carefully. (-:

    • one year ago
  13. mathavraj
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    :)

    • one year ago
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