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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
1.49*(4*2763+266)*(339/100) = 77176/x // - 77176/x
1.49*(4*2763+266)*(339/100)-(77176/x) = 0
1.49*(4*2763+266)*(339/100)-77176*x^-1 = 0
-77176*x^-1 = -57168.3498 // : -77176
x^-1 = 0.74075295
-1 < 0
1/(x^1) = 0.74075295 // * x^1
1 = 0.74075295*x^1 // : 0.74075295
1.34997775 = x^1
x = 1.34997775
x = 1.34997775
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