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D( x )
x = 0
2*x = 0
x-1 = 0
x = 0
x = 0
2*x = 0
2*x = 0
2*x = 0 // : 2
x = 0
x-1 = 0
x-1 = 0
x-1 = 0 // + 1
x = 1
x in (-oo:0) U (0:1) U (1:+oo)
2/(x-1)-(3/x) = 7/(2*x) // - 7/(2*x)
2/(x-1)-(3/x)-(7/(2*x)) = 0
2/(x-1)-3*x^-1+(-7/2)*x^-1 = 0
2/(x-1)-3/x-7/(2*x) = 0
(2*2*x*x)/(2*x*x*(x-1))+(-3*2*x*(x-1))/(2*x*x*(x-1))+(-7*x*(x-1))/(2*x*x*(x-1)) = 0
2*2*x*x-3*2*x*(x-1)-7*x*(x-1) = 0
6*x-2*x^2-7*x^2+7*x = 0
13*x-9*x^2 = 0
13*x-9*x^2 = 0
x*(13-9*x) = 0
13-9*x = 0 // - 13
-9*x = -13 // : -9
x = -13/(-9)
x = 13/9
x*(x-13/9) = 0
(x*(x-13/9))/(2*x*x*(x-1)) = 0
(x*(x-13/9))/(2*x*x*(x-1)) = 0 // * 2*x*x*(x-1)
x*(x-13/9) = 0
( x-13/9 )
x-13/9 = 0 // + 13/9
x = 13/9
( x )
x = 0
x in { 0}
x = 13/9
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