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X in (-oo:+oo)
-8 = (X^11)/2 // - (X^11)/2
-((X^11)/2)-8 = 0
-1/2*X^11 = 8 // : -1/2
X^11 = -16
X^11 = -16 // ^ 1/11
X = -16^(1/11)
X = -16^(1/11)
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