已知实数xy满足x2+y2=4.则y+3/x+1的取值范围为

已知实数xy满足x2+y2=4.则y+3/x+1的取值范围为

已知实数xy满足x2+y2=4.则y+3/x+1的取值范围为
﹙－∞，﹙－3－2√6﹚/3]∪[﹙－3＋2√6﹚/3,＋∞﹚