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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(2*x-1)/x = (3*x)/4 // - (3*x)/4
(2*x-1)/x-((3*x)/4) = 0
(2*x-1)/x+(-3/4)*x = 0
(2*x-1)/x+(-3*x)/4 = 0
(4*(2*x-1))/(4*x)+(-3*x*x)/(4*x) = 0
4*(2*x-1)-3*x*x = 0
8*x-3*x^2-4 = 0
8*x-3*x^2-4 = 0
8*x-3*x^2-4 = 0
DELTA = 8^2-(-4*(-3)*4)
DELTA = 16
DELTA > 0
x = (16^(1/2)-8)/(-3*2) or x = (-16^(1/2)-8)/(-3*2)
x = 2/3 or x = 2
(x-2/3)*(x-2) = 0
((x-2/3)*(x-2))/(4*x) = 0
((x-2/3)*(x-2))/(4*x) = 0 // * 4*x
(x-2/3)*(x-2) = 0
( x-2/3 )
x-2/3 = 0 // + 2/3
x = 2/3
( x-2 )
x-2 = 0 // + 2
x = 2
x in { 2/3, 2 }
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