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D( x )
x^6-(5*x) = 0
x^6-(5*x) = 0
x^6-(5*x) = 0
x^6-5*x = 0
x^6-5*x = 0
x*(x^5-5) = 0
1*x^5 = 5 // : 1
x^5 = 5
x^5 = 5 // ^ 1/5
x = 5^(1/5)
x = 0
x = 0
x in (-oo:0) U (0:5^(1/5)) U (5^(1/5):+oo)
1/(x^6-(5*x)) = 0
1/(x^6-5*x) = 0
x^6-5*x = 0
x*(x^5-5) = 0
1*x^5 = 5 // : 1
x^5 = 5
x^5 = 5 // ^ 1/5
x = 5^(1/5)
x*(x-5^(1/5)) = 0
1/(x*(x-5^(1/5))) = 0
x belongs to the empty set
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