发布网友 发布时间:2024-10-24 15:02
共2个回答
热心网友 时间:2小时前
OA = (-2,1),OB=(-1,1)
OC=α向量OA+β向量OB
m-2 = -2α-β
m = α+β
解
α=2-2m, 由0≤α≤1, 得1/2 <= m <= 1
β = 3m-2,由0≤β≤1,得2/3 <= m <= 1
所以2/3<=m <=1
α²+β² = 13m^2 - 20m + 8= 13(m - 10/13)^2 + 4/13
4/13 应该是最小值
热心网友 时间:2小时前
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