{5x−1<3x+1x+13≤3x+12+1 .
读北方地区位置和地形图,回答下列问题。
A: What did she do? B: She ______.
已知|OA→|=4,|OB→|=2,∠AOB=2π3,OC→=xOA→+yOB→,且x+2y=1,则|OC→|的最小值是____