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D( x )
5.56^2*x = 0
5.56^2*x = 0
5.56^2*x = 0
5.56^2*x = 0 // : 5.56^2
x = 0
x in (-oo:0) U (0:+oo)
0.6 = (10.8-3)/(5.56^2*x) // - (10.8-3)/(5.56^2*x)
0.6-((10.8-3)/(5.56^2*x)) = 0
-7.8*5.56^-2*x^-1 = -0.6 // : -7.8*5.56^-2
x^-1 = 0.07692308*5.56^2
-1 < 0
1/(x^1) = 0.07692308*5.56^2 // * x^1
1 = 0.07692308*5.56^2*x^1 // : 0.07692308*5.56^2
12.99999948*5.56^-2 = x^1
x = 12.99999948*5.56^-2
x = 12.99999948*5.56^-2
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