共50条信息
已知\(\vec{a}=(3,-2,1)\),\(\overrightarrow{b}=(-2,4,0)\),\(\overrightarrow{c}=(3,0,2)\),则\(\overrightarrow{a}-2\overrightarrow{b}+4\overrightarrow{c}=\)_______.
向量\(a\)\(=(-2,-3,1)\),\(b\)\(=(2,0,4)\),\(c\)\(=(-4,-6,2)\),下列结论正确的是\((\) \()\)
已知\( \overset{⇀}{a}=\left(3,2,-1\right) \),\( \overset{⇀}{b}=\left(x,-4,2\right) \),且\(\overrightarrow{a}\bot \overrightarrow{b}\),则\(x=\)_______.
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