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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(3/x)/8 = -2 // + 2
(3/x)/8+2 = 0
3/8*x^-1 = -2 // : 3/8
x^-1 = -16/3
-1 < 0
1/(x^1) = -16/3 // * x^1
1 = -16/3*x^1 // : -16/3
-3/16 = x^1
x = -3/16
x = -3/16
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