(m-2)x>1-m → (m-2)x<m-1→ m<2时:x>(m-1)/(m-2)m=2时,x∈Rm>2时:x<(m-1)/(m-2)mx²-x+m<0∵解是一切实数∴m<0且△=1-4m²<0∴m<-1/2(x+2)/k>1+(x-3)/k²两边同乘以k²得:k(x+2)>k²+x-3(k-1)x>k²-2k-3∵解是x>3∴k-1>0并且k²-2k-3=3(k-1)即:k>1并且k²-5k=0∴k=5