已知两个非零向量a，b满足|a+b|=|a-b|，则下面结论正确的是( )A.a／／b B.a⊥b C.a+b=0 D.a+b=a-b

作者: tihaiku 人气: - 评论: 0

问题已知两个非零向量a，b满足|a+b|=|a-b|，则下面结论正确的是( )

选项 A.a／／b B.a⊥b C.a+b=0 D.a+b=a-b

答案 B

解析由|a+b|=|a-b|平方，可得a·b=0，所以a⊥b，故选B。

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已知两个非零向量a，b满足|a+b|=|a-b|，则下面结论正确的是( )A.a／／b B.a⊥b C.a+b=0 D.a+b=a-b

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