Math

QuestionFind the value of i99i^{99}.

Studdy Solution

STEP 1

Assumptions1. We are dealing with complex numbers where ii is the imaginary unit with the property that i=1i^ = -1.

STEP 2

We know that the powers of ii repeat every4th power. This is becausei1=ii^1 = ii2=1i^2 = -1i=ii^ = -ii4=1i^4 =1After this, the pattern repeats.

STEP 3

To find i99i^{99}, we can use the fact that the powers of ii repeat everyth power. So, we can divide99 by to find the remainder.
99 \mod

STEP 4

Calculate the remainder.
99mod4=399 \mod4 =3

STEP 5

The remainder is3, so i99i^{99} is equivalent to i3i^3.
i99=i3i^{99} = i^3

STEP 6

We know that i3=ii^3 = -i.
i99=ii^{99} = -iSo, i99i^{99} equals i-i.

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