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D( x )
x-2 = 0
x-2 = 0
x-2 = 0
x-2 = 0 // + 2
x = 2
x in (-oo:2) U (2:+oo)
15 = 14/(x-2) // - 14/(x-2)
15-(14/(x-2)) = 0
15-14*(x-2)^-1 = 0
15-14/(x-2) = 0
(15*(x-2))/(x-2)-14/(x-2) = 0
15*(x-2)-14 = 0
15*x-44 = 0
(15*x-44)/(x-2) = 0
(15*x-44)/(x-2) = 0 // * x-2
15*x-44 = 0
15*x-44 = 0 // + 44
15*x = 44 // : 15
x = 44/15
x = 44/15
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