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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
10/x = 15.963/5.765 // - 15.963/5.765
10/x-(15.963/5.765) = 0
10/x-2.76895056 = 0
10*x^-1 = 2.76895056 // : 10
x^-1 = 0.27689506
-1 < 0
1/(x^1) = 0.27689506 // * x^1
1 = 0.27689506*x^1 // : 0.27689506
3.61147649 = x^1
x = 3.61147649
x = 3.61147649
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