本课配套习题挑战模式1/4
点B是点A(1,2,3)在坐标平面内的射影,则OB等于( )
A: |
B: |
C: |
D: |
- 提示1:PHA+5qC55o2u6aKY5oSP5Y+v5b6XPGltZyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzQ3LzVCL3JCQUNKMVRaV2EtVDAyNmpBQUFDWlpQOU5jSTQ2Ni5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNDcvNUIvckJBQ0oxVFpXYS1UMDI2akFBQUNaWlA5TmNJNDY2LnBuZyIgaGVpZ2h0PSIyMSIgd2lkdGg9IjYyIj7vvIw8L3A+
- 提示2:PHA+PGltZyBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzdCL0NCL3JCQUNFMVRaV2JERDB5eGxBQUFHa2gwQ0ZoODY5OC5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvN0IvQ0IvckJBQ0UxVFpXYkREMHl4bEFBQUdraDBDRmg4Njk4LnBuZyIgaGVpZ2h0PSIyNyIgd2lkdGg9IjEyNiI+PC9wPg==
- 答案:QQ==
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
本课配套习题挑战模式2/4
下列命题正确的是( )
A: 如果向量,与任何向量不能构成空间的基底,那么,不共线 |
B: 如果,,是三个基向量,那么+, +, +,不能构成空间的一个基底 |
C: 若,,不构成空间的一个基底,那么O,A,B,C四点共面 |
D: 空间中的基底只有有限个 |
- 提示1:PHA+56m66Ze05ZCR6YeP5Z+65bqV55qE6YCJ5Y+W5Y6f5YiZ5piv5LiN5YWx6Z2i55qE5ZCR6YePPC9wPg==
- 提示2:PHA+5Z+65bqV5Lit55qE5LiJ5Liq5ZCR6YeP5LiN5YWx6Z2i77yM5omA5Lul56m66Ze05Lit55qE5Z+65bqV5pyJ5peg5pWw57uEPGJyPjwvcD4=
- 答案:Qw==
PHA+55Sx56m66Ze05ZCR6YeP5Z+65pys5a6a55CG55+l77yMQ+ato+ehrjwvcD4=
本课配套习题挑战模式3/4
若为空间的一组基底,则下列各项中,能构成基底的一组向量是( )
A: |
B: |
C: |
D: |
- 提示1:PHA+5YiG5Yir5Yik5pat5q+P5Liq6YCJ6aG5PGJyPjwvcD4=
- 提示2:PHA+5LiN5YWx6Z2i55qE5LiJ5Liq5ZCR6YeP5Y+v5Lul5p6E5oiQ5Z+65bqVPGJyPjwvcD4=
- 答案:Qw==
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
本课配套习题挑战模式4/4
已知A、B、C三点不共线,对平面ABC外的任一点O,下列条件中能确定点M与点A、B、C一定共面的是( )
A: |
B: |
C: |
D: |
- 提示1:PHA+6K+B5piO5Zub54K55YWx6Z2iPC9wPg==
- 答案:RA==
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