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D( x )
x = 0
x^2 = 0
x = 0
x = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
-600/x = 0.6/(x^2) // - 0.6/(x^2)
-600/x-(0.6/(x^2)) = 0
-600/x-0.6*x^-2 = 0
-600*x^-1-0.6*x^-2 = 0
t_1 = x^-1
-0.6*t_1^2-600*t_1^1 = 0
-0.6*t_1^2-600*t_1 = 0
DELTA = (-600)^2-(-0.6*0*4)
DELTA = 360000
DELTA > 0
t_1 = (360000^(1/2)+600)/(-0.6*2) or t_1 = (600-360000^(1/2))/(-0.6*2)
t_1 = -1000 or t_1 = 0
t_1 = -1000
x^-1+1000 = 0
1*x^-1 = -1000 // : 1
x^-1 = -1000
-1 < 0
1/(x^1) = -1000 // * x^1
1 = -1000*x^1 // : -1000
-1/1000 = x^1
x = -1/1000
t_1 = 0
x^-1+0 = 0
x^-1 = 0
1*x^-1 = 0 // : 1
x^-1 = 0
x należy do O
x = -1/1000
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