1、[(x-1)^2]*(x-3)*(x-5)*(x-7)^3<0 2、(2x-1)*(2-x)*(x-1)*(3加x)大于等于0 3,[(x-1)^2]*[(x-2)^3]*[(x-3)^4]*[(4-x)^5]小于等于0 用穿针引线法容易些!在线等!