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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
8-(5/x) = 3/x+2 // - 3/x+2
8-(5/x)-(3/x)-2 = 0
8-5*x^-1-3*x^-1-2 = 0
-8*x^-1 = -6 // : -8
x^-1 = 3/4
-1 < 0
1/(x^1) = 3/4 // * x^1
1 = 3/4*x^1 // : 3/4
4/3 = x^1
x = 4/3
x = 4/3
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