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x^6-(1/49) = 0
x^6-1/49 = 0
1*x^6 = 1/49 // : 1
x^6 = 1/49
x^6 = 1/49 // ^ 1/6
abs(x) = (1/49)^(1/6)
x = (1/49)^(1/6) or x = -(1/49)^(1/6)
x in { (1/49)^(1/6), -(1/49)^(1/6) }
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