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D( x )
x = 0
2*x-1 = 0
2*x = 0
x = 0
x = 0
2*x-1 = 0
2*x-1 = 0
2*x-1 = 0 // + 1
2*x = 1 // : 2
x = 1/2
2*x = 0
2*x = 0
2*x = 0 // : 2
x = 0
x in (-oo:0) U (0:1/2) U (1/2:+oo)
4/x-(6/(2*x-1)) = 1/(2*x) // - 1/(2*x)
4/x-(6/(2*x-1))-(1/(2*x)) = 0
4/x-6*(2*x-1)^-1+(-1/2)*x^-1 = 0
4/x-6/(2*x-1)-1/(2*x) = 0
(-6*2*x*x)/(2*x*x*(2*x-1))+(2*4*x*(2*x-1))/(2*x*x*(2*x-1))+(-1*x*(2*x-1))/(2*x*x*(2*x-1)) = 0
2*4*x*(2*x-1)-1*x*(2*x-1)-6*2*x*x = 0
4*x^2-2*x^2-8*x+x = 0
2*x^2-7*x = 0
2*x^2-7*x = 0
x*(2*x-7) = 0
2*x-7 = 0 // + 7
2*x = 7 // : 2
x = 7/2
x*(x-7/2) = 0
(x*(x-7/2))/(2*x*x*(2*x-1)) = 0
(x*(x-7/2))/(2*x*x*(2*x-1)) = 0 // * 2*x*x*(2*x-1)
x*(x-7/2) = 0
( x-7/2 )
x-7/2 = 0 // + 7/2
x = 7/2
( x )
x = 0
x in { 0}
x = 7/2
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