共50条信息
已知\(\overrightarrow{a}{=}\left( {-}2{,}1{,}3 \right)\),\(\overrightarrow{b}{=}\left( {-}1{,}2{,}1 \right)\),若\(\overrightarrow{a}{⊥}\left( \overrightarrow{a}{-}\lambda\overrightarrow{b} \right)\),则实数\(\lambda\) 的值为 \((\) \()\)
已知\(\overrightarrow{a}=\left(2,-1,3\right), \overrightarrow{b}=\left(-1,4,-2\right), \overrightarrow{c}=\left(7,5,λ\right) \)若\(\overrightarrow{a}, \overrightarrow{b}, \overrightarrow{c} \)三向量不能构成空间的一个基底,则实数\(\lambda \)的值为\((\) \()\)。
设\(O\)为坐标原点,\(M(5,-1,2)\),\(A(4,2,-1)\),若\(\overrightarrow{OM}=\overrightarrow{AB}\),则点\(B\)应为\((\) \()\)
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