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D( x )
x < 0
x = 0
1/x < 0
x < 0
x = 0
x = 0
1/x < 0
1/x < 0
1*x^-1 < 0
1*x^-1 < 0 // : 1
x^-1 < 0/1
x^-1 < 0
1/(x^1) < 0
x <> 0
1/(x^1) < 0 // * x^2
(x^2)/(x^1) < 0
x^1 < 0
x < 0
x in (-oo:0)
x in (0:+oo)
-2.5*x^1.5-(0.5*(1/x)^0.5) = 0
-2.5*x^1.5-0.5*(1/x)^0.5 = 0
-2.5*x^1.5-0.5*x^-0.5 = 0
-x^-0.5*(2.5*x^2+0.5) = 0
2.5*x^2 = -0.5 // : 2.5
x^2 = -0.2
-1/(x^0.5) = 0
-1*x^-0.5 = 0 // : -1
x^-0.5 = 0
x należy do O
x belongs to the empty set
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