x+1/x+6<=2^3=8x+1/x-2<=0(x^2-2x+1)/x<=0而x≠1时，x^2-2x+1>0，x=1时，x^2-2x+1=0x<0或x=1 另:x+1/x+6>0(x^2+6x+1)/x>0x=1时满足x<0时,x^2+6x+1<0-3-2√2解集为(-3-2√2,-3+2√2)∪{1}
