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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
X-(3/x)-8 = 3/5 // - 3/5
X-(3/x)-(3/5)-8 = 0
X-3*x^-1-3/5-8 = 0
-3*x^-1 = -(X-43/5) // : -3
x^-1 = (43/5-X)/(-3)
-1 < 0
1/(x^1) = (43/5-X)/(-3) // * x^1
1 = x^1*((43/5-X)/(-3)) // : (43/5-X)/(-3)
-3*(43/5-X)^-1 = x^1
x = -3*(43/5-X)^-1
x = -3*(43/5-X)^-1
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