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x in (-oo:+oo)
x^(1/3) = 3/2 // - 3/2
x^(1/3)-(3/2) = 0
x^(1/3)-3/2 = 0
1*x^(1/3) = 3/2 // : 1
x^(1/3) = 3/2
x^(1/3) = 3/2 // ^ 3
x = 27/8
x = 27/8
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