6-x分之x-2大于零6-(X-2)/X>0(X-2)/X<66X>X-25X>-2X>-2/5
(6-x)(x-2)>06x-12-x²+2x>0-x²+8x-12>0x²-8x+12<02<x<6不等式解集是(2,6)
(x一2)/(6一x)>0,x一2>0且6一╳>0,或x一2<0且6一X<026,这种情况不可能,所以2
(x一2)/(6一x)>0(x一2)/(ⅹ一6)<0∴2