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{x2=1x3=−1x4=1 \begin{cases} x^2&=& 1 \\ x^3 &=& -1 \\ x^4 &=& 1 \end{cases} ⎩⎪⎨⎪⎧x2x3x4===1−11
If all the equations above are true. Then what is the value of xxx?
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