已知向量OA=(4,-2),向量OB=(4,2),则向量1/2AB 等于?
谢谢……我也是算出来的……不过我画图怎么不是这个答案?
人气:361 ℃ 时间:2020-06-05 04:06:31
解答
ab=ob-oa=(4,2)-(4,-2)=(0,4) 1/2AB =(0,2)
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