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i+i2+i3+i4+⋯+in=−1 \large i + i^2 + i^3 + i^4 + \cdots + i^n = - 1 i+i2+i3+i4+⋯+in=−1
The equation above holds true for some positive integer nnn. Which of the following is a possible value of nnn?
Clarification: i=−1i=\sqrt{-1}i=−1.
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