- I am thinking of going back to school to get another degree.
- Sounds great! _____
A:Go for it
B:Never mind
C:Well done
D:That was good news
已知:a→、b→、c→是同一平面上的三个向量,其中a→=(1,2).
(1)若|c→|=25,且c→∥a→,求c→的坐标.
(2)若|b→|=52,且a→+2b→与2a→﹣b→垂直,求a→与b→的夹角θ