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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
8/x-2 = 2/11 // - 2/11
8/x-(2/11)-2 = 0
8/x-2/11-2 = 0
8*x^-1 = 24/11 // : 8
x^-1 = 3/11
-1 < 0
1/(x^1) = 3/11 // * x^1
1 = 3/11*x^1 // : 3/11
11/3 = x^1
x = 11/3
x = 11/3
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