设a,b为非零向量,λ∈R+,满足|a+b|=λ|a-b|,则“λ>1”是“a,b的夹角为锐角”的(  )A、充分不必要条件 B、必要不充分条件 C、...

作者: tihaiku 人气: - 评论: 0
问题 设a,b为非零向量,λ∈R+,满足|a+b|=λ|a-b|,则“λ>1”是“a,b的夹角为锐角”的(  )
选项 A、充分不必要条件 B、必要不充分条件 C、充分必要条件 D、既不充分也不必要条件
答案 B
解析

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