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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
596 = 5.99*(1/x-0.5) // - 5.99*(1/x-0.5)
596-(5.99*(1/x-0.5)) = 0
596-5.99*(1/x-0.5) = 0
596-5.99*(x^-1-0.5) = 0
596-5.99*(x^-1-0.5) = 0
598.995-5.99*x^-1 = 0
598.995-5.99*x^-1 = 0
-5.99*x^-1 = -598.995 // : -5.99
x^-1 = 99.99916528
-1 < 0
1/(x^1) = 99.99916528 // * x^1
1 = 99.99916528*x^1 // : 99.99916528
0.01000008 = x^1
x = 0.01000008
x = 0.01000008
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