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D( x )
8*x^(4/3) <= 0
8*x^(4/3) <= 0
8*x^(4/3) <= 0
8*x^(4/3) <= 0
8*x^(4/3) <= 0 // : 8
x^(4/3) <= 0/8
x^(4/3) <= 0
x >= 0
x in <0:0>
x in (-oo:0) U (0:+oo)
log(2)(8*x^(4/3)) = 0
log(2)(8*x^(4/3)) = log(2)(2^0)
8*x^(4/3) = 2^0
8*x^(4/3)-2^0 = 0
8*x^(4/3) = 1 // : 8
x^(4/3) = 1/8
x^(4/3) = 1/8 // ^ 3
x^4 = 1/512 // ^ 1/4
abs(x) = (1/512)^(1/4)
x = (1/512)^(1/4) or x = -(1/512)^(1/4)
x in { (1/512)^(1/4), -(1/512)^(1/4) }
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