直三棱柱ABC-A1B1C1中,若
=
,
=
,
=
,則
- A.
- B.
- C.
- D.
D
分析:將向量
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分解成
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+
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,然后將利用相等向量和向量的三角形法則將
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與
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化成用
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、
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、
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表示即可.
解答:
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=
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+
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=-
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+
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-
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=-
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+
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-
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故選D.
點評:本題主要考查了空間向量的加減法,解題的關(guān)鍵是利用向量的三角形法則,屬于基礎(chǔ)題.
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