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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(1.49*(4*2768+276)*(320/100))/x = 73044 // - 73044
(1.49*(4*2768+276)*(320/100))/x-73044 = 0
54107.264*x^-1 = 73044 // : 54107.264
x^-1 = 1.3499851
-1 < 0
1/(x^1) = 1.3499851 // * x^1
1 = 1.3499851*x^1 // : 1.3499851
0.74074892 = x^1
x = 0.74074892
x = 0.74074892
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