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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
6/x = 2.236 // - 2.236
6/x-2.236 = 0
6*x^-1 = 2.236 // : 6
x^-1 = 0.37266667
-1 < 0
1/(x^1) = 0.37266667 // * x^1
1 = 0.37266667*x^1 // : 0.37266667
2.68336312 = x^1
x = 2.68336312
x = 2.68336312
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