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D( x )
9*x <= 0
(x^5)/2 <= 0
9*x <= 0
9*x <= 0
9*x+0 <= 0 // - 0
9*x <= 0 // : 9
x <= 0/9
x <= 0
(x^5)/2 <= 0
(x^5)/2 <= 0
1/2*x^5 <= 0
1/2*x^5 <= 0 // : 1/2
x^5 <= 0/1/2
x^5 <= 0
x^5 <= 0 // ^ 1/5
x <= 0
x in (-oo:0>
x in (0:+oo)
ln((x^5)/2)+ln(9*x) = 0
ln(1*((x^5)/2))+ln(9*x) = 0
ln(1*9*x*((x^5)/2)) = 0
ln(9*x*((x^5)/2)) = 0
ln(9*x*((x^5)/2)) = ln(e^0)
9*x*((x^5)/2) = e^0
9*x*((x^5)/2)-e^0 = 0
9/2*x^6 = 1 // : 9/2
x^6 = 2/9
x^6 = 2/9 // ^ 1/6
abs(x) = (2/9)^(1/6)
x = (2/9)^(1/6) or x = -(2/9)^(1/6)
x in { -(2/9)^(1/6)}
x = (2/9)^(1/6)
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