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D( x )
x = 0
x-1 = 0
x = 0
x = 0
x-1 = 0
x-1 = 0
x-1 = 0 // + 1
x = 1
x in (-oo:0) U (0:1) U (1:+oo)
3/(x-1)-(4/x) >= 1 // - 1
3/(x-1)-(4/x)-1 >= 0
3/(x-1)-4*x^-1-1 >= 0
3/(x-1)-4/x-1 >= 0
(3*x)/(x*(x-1))+(-4*(x-1))/(x*(x-1))+(-1*x*(x-1))/(x*(x-1)) >= 0
3*x-4*(x-1)-1*x*(x-1) >= 0
x-x^2-x+4 >= 0
4-x^2 >= 0
(4-x^2)/(x*(x-1)) >= 0
(4-x^2)/(x*(x-1)) >= 0 // * (x*(x-1))^2
x*(4-x^2)*(x-1) >= 0
( 4-x^2 )
-1*x^2 >= -4
-1*x^2 >= -4 // * -1
1*x^2 <= 4
1*x^2 <= 4 // : 1
x^2 <= 4/1
x^2 <= 4
x^2 <= 4 // ^ 1/2
abs(x) <= 2
x in <-2:2>
( x-1 )
x-1 >= 0 // + 1
x >= 1
( x )
x+0 >= 0 // - 0
x >= 0
(-oo:-2) (-2:0) (0:1) (1:2) (2:+oo) 4-x^2 - + + + - x-1 - - - + + x - - + + +
x in <-2:0) U (1:2>
<-2:0) U (1:2>
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