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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
10/x-26 = 14.3 // - 14.3
10/x-26-14.3 = 0
10*x^-1 = 40.3 // : 10
x^-1 = 4.03
-1 < 0
1/(x^1) = 4.03 // * x^1
1 = 4.03*x^1 // : 4.03
0.24813896 = x^1
x = 0.24813896
x = 0.24813896
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