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31 May, 14:38

If i = sqrt-1, what is the value of i^3

a. - 1

b. i

c. 1

d. - i

+4
Answers (2)
  1. 31 May, 15:46
    0
    We can think about it like this:

    We know how powers work, and anything to the third power is equal to multiplying by itself 3 times.

    We will apply this Idea

    i^3=i (i) (i)

    i^3=i (i^2)

    i^3=i (-1)

    i^3=-i

    The answer is D.
  2. 31 May, 15:51
    0
    I think it's D. it's been awhile since I've done those, though
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