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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
5/x-2 = 3/4 // - 3/4
5/x-(3/4)-2 = 0
5/x-3/4-2 = 0
5*x^-1 = 11/4 // : 5
x^-1 = 11/20
-1 < 0
1/(x^1) = 11/20 // * x^1
1 = 11/20*x^1 // : 11/20
20/11 = x^1
x = 20/11
x = 20/11
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