优优班--学霸训练营 > 知识点挑题
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            • 1.
              已知\(M\)是\(\triangle ABC\)的\(BC\)边上的中点,若向量\(\overrightarrow{AB}= \overrightarrow{a} \),\(\overrightarrow{AC}= \overrightarrow{b} \),则向量\( \overrightarrow{AM}\)等于\((\)  \()\)
              A.\( \dfrac {1}{2}( \overrightarrow{a}- \overrightarrow{b})\)
              B.\(\dfrac{1}{2}\left( \overrightarrow{b}- \overrightarrow{a}\right) \)
              C.\(\dfrac{1}{2}\left( \overrightarrow{a}+ \overrightarrow{b}\right) \)
              D.\(- \dfrac{1}{2}\left( \overrightarrow{a}+ \overrightarrow{b}\right) \)
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