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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
0.17/x = 1/12 // - 1/12
0.17/x-(1/12) = 0
0.17/x-1/12 = 0
0.17*x^-1 = 1/12 // : 0.17
x^-1 = 0.49019606
-1 < 0
1/(x^1) = 0.49019606 // * x^1
1 = 0.49019606*x^1 // : 0.49019606
2.04000008 = x^1
x = 2.04000008
x = 2.04000008
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