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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
x+2/x-1 = x+8/x+3 // - x+8/x+3
x-x+2/x-(8/x)-3-1 = 0
x-x+2/x-8*x^-1-3-1 = 0
-6*x^-1 = 4 // : -6
x^-1 = -2/3
-1 < 0
1/(x^1) = -2/3 // * x^1
1 = -2/3*x^1 // : -2/3
-3/2 = x^1
x = -3/2
x = -3/2
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