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D( x )
x = 0
x^-16 = 0
x = 0
x = 0
x^-16 = 0
x^-16 = 0
1*x^-16 = 0 // : 1
x^-16 = 0
x naleu017Cy do O
x in (-oo:0) U (0:+oo)
x = x-(5/(x^-16)) // - x-(5/(x^-16))
5/(x^-16)+x-x = 0
5*x^16 = 0 // : 5
x^16 = 0
x = 0
x in { 0}
x belongs to the empty set
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