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