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D( x )
x-1 = 0
x-1 = 0
x-1 = 0
x-1 = 0 // + 1
x = 1
x in (-oo:1) U (1:+oo)
710-((5*x)/(x-1)) = x // - x
710-((5*x)/(x-1))-x = 0
710-5*x*(x-1)^-1-x = 0
(-5*x)/(x-1)-x+710 = 0
(-5*x)/(x-1)+(-x*(x-1))/(x-1)+(710*(x-1))/(x-1) = 0
710*(x-1)-x*(x-1)-5*x = 0
710*x-x^2-4*x-710 = 0
706*x-x^2-710 = 0
706*x-x^2-710 = 0
706*x-x^2-710 = 0
DELTA = 706^2-(-710*(-1)*4)
DELTA = 495596
DELTA > 0
x = (495596^(1/2)-706)/(-1*2) or x = (-495596^(1/2)-706)/(-1*2)
x = (2*123899^(1/2)-706)/(-2) or x = (-2*123899^(1/2)-706)/(-2)
(x-((2*123899^(1/2)-706)/(-2)))*(x-((-2*123899^(1/2)-706)/(-2))) = 0
((x-((2*123899^(1/2)-706)/(-2)))*(x-((-2*123899^(1/2)-706)/(-2))))/(x-1) = 0
((x-((2*123899^(1/2)-706)/(-2)))*(x-((-2*123899^(1/2)-706)/(-2))))/(x-1) = 0 // * x-1
(x-((2*123899^(1/2)-706)/(-2)))*(x-((-2*123899^(1/2)-706)/(-2))) = 0
( x-((-2*123899^(1/2)-706)/(-2)) )
x-((-2*123899^(1/2)-706)/(-2)) = 0 // + (-2*123899^(1/2)-706)/(-2)
x = (-2*123899^(1/2)-706)/(-2)
( x-((2*123899^(1/2)-706)/(-2)) )
x-((2*123899^(1/2)-706)/(-2)) = 0 // + (2*123899^(1/2)-706)/(-2)
x = (2*123899^(1/2)-706)/(-2)
x in { (-2*123899^(1/2)-706)/(-2), (2*123899^(1/2)-706)/(-2) }
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