Math

QuestionFind the value of i120i^{120}.

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 every4 cycles, i.e., i1=ii^1 = i, i2=1i^2 = -1, i=ii^ = -i, i4=1i^4 =1, and then i5=ii^5 = i, i6=1i^6 = -1, and so on.

STEP 3

Therefore, we can simplify i120i^{120} by finding the remainder when120 is divided by, because the powers of ii repeat every cycles.
i120=i×30i^{120} = i^{ \times30}

STEP 4

Since i4=1i^4 =1, we can simplify i4×30i^{4 \times30} to 1301^{30}.
i4×30=130i^{4 \times30} =1^{30}

STEP 5

Finally, any number to the power of30 is itself, so 130=11^{30} =1.
130=11^{30} =1So, i120=1i^{120} =1.

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