共50条信息
在空间直角坐标系中,\(A(1,1,-2)\),\(B(1,2,-3)\),\(C(-1,3,0)\),\(D(x,y,z)\),\((x,y,z∈R)\),若四点\(A\),\(B\),\(C\),\(D\)共面,则( )
已知向量\(a=\left(-2,3,1\right) \),\(b=\left(4,m,n\right) \),且\(a/\!/b \),则\(m+n\)的值为_________.
已知\(\overrightarrow{a}=\left(2,-1,2\right), \overrightarrow{b}=\left(-1,3,-3\right), \overrightarrow{c}=\left(13,6,λ\right) \),若向量\(\overrightarrow{a}, \overrightarrow{b}, \overrightarrow{c} \)共面,则\(\lambda =\)_________.
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\((\) \()\)。
.已知\(a\)\(=\)\((\)\(λ\)\(+\)\(1\),\(0\),\(2)\),\(b\)\(=\)\((6,2\)\(μ\)\(-\)\(1\),\(2\)\(λ\)\()\),若\(a/\!/b\),则\(λ\)与\(μ\)的值可以是\((\) \()\)
进入组卷