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D( x )
x+344 = 0
x+344 = 0
x+344 = 0
x+344 = 0 // - 344
x = -344
x in (-oo:-344) U (-344:+oo)
(344-x)/(x+344) = 6.65 // - 6.65
(344-x)/(x+344)-6.65 = 0
(344-x)/(x+344)+(-6.65*(x+344))/(x+344) = 0
344-6.65*(x+344)-x = 0
-7.65*x-1943.6 = 0
(-7.65*x-1943.6)/(x+344) = 0
(-7.65*x-1943.6)/(x+344) = 0 // * x+344
-7.65*x-1943.6 = 0
-7.65*x-1943.6 = 0 // + 1943.6
-7.65*x = 1943.6 // : -7.65
x = 1943.6/(-7.65)
x = -254.06535948
x = -254.06535948
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