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平面向量数量积的意义

> 已知 a 是平面内的单位向量，若向量 b 满足 b •( a - b )=0，则 | b |的取值范围是（　　） A．[0， 3 ] B．[ 1 2 ，1] C．[0，1] D．[0， 1 2 ]

问题：

发布时间：2024-09-08

已知

a

是平面内的单位向量，若向量

b

满足

b

•(

a

-

b

)=0，则 |

b

|的取值范围是（　　）

A．[0，

3

] B．[

1

2

，1] C．[0，1] D．[0，

1

2

]

参考答案：

提问用户：2B***IE7

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已知 a 是平面内的单位向量，若向量 b 满足 b •( a - b )=0，则 | b |的取值范围是（ ） A．[0， 3 ] B．[ 1 2 ，1] C．[0，1] D．[0， 1 2 ]

可能感兴趣的题目：

已知

a

是平面内的单位向量，若向量

b

满足

b

•(

a

-

b

)=0，则 |

b

|的取值范围是（　　）

A．[0，

3

] B．[

1

2

，1] C．[0，1] D．[0，

1

2

]