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D( x )
x < 0
3*x <= 0
x^(3/4) <= 0
x < 0
3*x <= 0
3*x <= 0
3*x+0 <= 0 // - 0
3*x <= 0 // : 3
x <= 0/3
x <= 0
x^(3/4) <= 0
x^(3/4) <= 0
1*x^(3/4) <= 0
1*x^(3/4) <= 0 // : 1
x^(3/4) <= 0/1
x^(3/4) <= 0
x >= 0
x in <0:0>
x in (0:+oo)
5*ln(x^(3/4))+ln(3*x) = 0
3/4*5*ln(x)+ln(3*x) = 0
ln(1*x^(15/4))+ln(3*x) = 0
ln(1*3*x*x^(15/4)) = 0
ln(3*x*x^(15/4)) = 0
ln(3*x*x^(15/4)) = ln(e^0)
3*x*x^(15/4) = e^0
3*x*x^(15/4)-e^0 = 0
3*x^(19/4) = 1 // : 3
x^(19/4) = 1/3
x^(19/4) = 1/3 // ^ 4
x^19 = 1/81 // ^ 1/19
x = (1/81)^(1/19)
x = (1/81)^(1/19)
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