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D( x )
x-2 = 0
x = 0
x-2 = 0
x-2 = 0
x-2 = 0 // + 2
x = 2
x = 0
x = 0
x in (-oo:0) U (0:2) U (2:+oo)
9/(x-2)+1/x = 0
(9*x)/(x*(x-2))+(1*(x-2))/(x*(x-2)) = 0
1*(x-2)+9*x = 0
10*x-2 = 0
(10*x-2)/(x*(x-2)) = 0
(10*x-2)/(x*(x-2)) = 0 // * x*(x-2)
10*x-2 = 0
10*x-2 = 0 // + 2
10*x = 2 // : 10
x = 2/10
x = 1/5
x = 1/5
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