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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(351120-x)/x = 0.01 // - 0.01
(351120-x)/x-0.01 = 0
(351120-x)/x+(-0.01*x)/x = 0
351120-x-0.01*x = 0
351120-1.01*x = 0
(351120-1.01*x)/x = 0
(351120-1.01*x)/x = 0 // * x
351120-1.01*x = 0
351120-1.01*x = 0 // - 351120
-1.01*x = -351120 // : -1.01
x = -351120/(-1.01)
x = 347643.56435644
x = 347643.56435644
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