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D( x )
x = 0
x^-3*y^5 = 0
x = 0
x = 0
x^-3*y^5 = 0
x^-3*y^5 = 0
x^-3*y^5 = 0 // : y^5
x^-3 = 0
x należy do O
x in (-oo:0) U (0:+oo)
-1*((x^4*y-2)/(x^-3*y^5)) = 0
-((x^4*y-2)/(x^-3*y^5)) = 0
(-1*(x^4*y-2))/(x^-3*y^5) = 0
( -1 )
-1 = 0
x belongs to the empty set
( x^4*y-2 )
x^4*y = 2 // : y
x^4 = 2/y
x^4 = 2/y // ^ 1/4
abs(x) = (2^(1/4))/(y^(1/4))
x = (2^(1/4))/(y^(1/4)) or x = -((2^(1/4))/(y^(1/4)))
x in { (2^(1/4))/(y^(1/4)), -((2^(1/4))/(y^(1/4))) }
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