1.|向量OA|=4,|向量OB|=2,∠AOB=2π/3,向量OC=x向量OA+y向量OB 且x+2y=1,则|向量OC|的最小值是?2.O是三角形ABC的外心,AB=2,AC=1,∠BAC=120°,向量AO=a向量AB+b向量AC,则a+b的值为?3.一箱苹果分给若干个小朋友,每位
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/29 13:45:33
![1.|向量OA|=4,|向量OB|=2,∠AOB=2π/3,向量OC=x向量OA+y向量OB 且x+2y=1,则|向量OC|的最小值是?2.O是三角形ABC的外心,AB=2,AC=1,∠BAC=120°,向量AO=a向量AB+b向量AC,则a+b的值为?3.一箱苹果分给若干个小朋友,每位](/uploads/image/z/1189259-35-9.jpg?t=1.%7C%E5%90%91%E9%87%8FOA%7C%3D4%2C%7C%E5%90%91%E9%87%8FOB%7C%3D2%2C%E2%88%A0AOB%3D2%CF%80%2F3%2C%E5%90%91%E9%87%8FOC%3Dx%E5%90%91%E9%87%8FOA%2By%E5%90%91%E9%87%8FOB+%E4%B8%94x%2B2y%3D1%2C%E5%88%99%7C%E5%90%91%E9%87%8FOC%7C%E7%9A%84%E6%9C%80%E5%B0%8F%E5%80%BC%E6%98%AF%3F2.O%E6%98%AF%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E5%A4%96%E5%BF%83%2CAB%3D2%2CAC%3D1%2C%E2%88%A0BAC%3D120%C2%B0%2C%E5%90%91%E9%87%8FAO%3Da%E5%90%91%E9%87%8FAB%2Bb%E5%90%91%E9%87%8FAC%2C%E5%88%99a%2Bb%E7%9A%84%E5%80%BC%E4%B8%BA%3F3.%E4%B8%80%E7%AE%B1%E8%8B%B9%E6%9E%9C%E5%88%86%E7%BB%99%E8%8B%A5%E5%B9%B2%E4%B8%AA%E5%B0%8F%E6%9C%8B%E5%8F%8B%2C%E6%AF%8F%E4%BD%8D)
xUnF~er.)JHJ
H=[5 iB?J[+c!ȏ#ml+ʊlOzr4zH/ų373qvB7O:1Ƀ1&K˵u֔x+`ч?9oQkNEA;>1zm £g[dA!d9ܠӲjekrxV9Z`0/Cy駃x85mDͰNp\'I%Dv\PpFBkC|
s =H0F>Dd>*65B˳ߜ'Q{o,vXרf9ktZsk\T V)-x0!+OUJxt8;N%W[>tܑ(+]Җ)XG