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D( c )
c-2 = 0
c = 0
c-2 = 0
c-2 = 0
c-2 = 0 // + 2
c = 2
c = 0
c = 0
c in (-oo:0) U (0:2) U (2:+oo)
4/(c-2)-(3/c) < 0
4/(c-2)-3*c^-1 < 0
4/(c-2)-3/c < 0
(4*c)/(c*(c-2))+(-3*(c-2))/(c*(c-2)) < 0
4*c-3*(c-2) < 0
c+6 < 0
(c+6)/(c*(c-2)) < 0
(c+6)/(c*(c-2)) < 0 // * (c*(c-2))^2
c*(c+6)*(c-2) < 0
( c+6 )
c+6 < 0 // - 6
c < -6
( c-2 )
c-2 < 0 // + 2
c < 2
( c )
c+0 < 0 // - 0
c < 0
(-oo:-6) (-6:0) (0:2) (2:+oo) c+6 - + + + c-2 - - - + c - - + +
c in (-oo:-6) U (0:2)
(-oo:-6) U (0:2)
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