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D( x )
(x^8*y^-4)/(16^(4/3)) = 0
16^(4/3) = 0
(x^8*y^-4)/(16^(4/3)) < 0
(x^8*y^-4)/(16^(4/3)) = 0
(x^8*y^-4)/(16^(4/3)) = 0
(1/(16^(4/3)))*x^8*y^-4 = 0 // : (1/(16^(4/3)))*y^-4
x^8 = 0
x = 0
16^(4/3) = 0
16^(4/3) = 0
16^(4/3) = 0
x belongs to the empty set
(x^8*y^-4)/(16^(4/3)) < 0
(x^8*y^-4)/(16^(4/3)) < 0
(x^8*y^-4)/(16^(4/3)) = 0
(1/(16^(4/3)))*x^8*y^-4 = 0 // : (1/(16^(4/3)))*y^-4
x^8 = 0
x = 0
x < 0
(-oo:0) (0:+oo) x - +
x in (0:+oo)
((x^8*y^-4)/(16^(4/3)))^(-1/4) = 0
2*2^(1/3)*x^-2*y = 0 // : 2*2^(1/3)*y
x^-2 = 0
x należy do O
x belongs to the empty set
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