Mathematics, 30.07.2019 21:10 pr47723
Find a nonzero vector x perpendicular to the vector v= [-2,-8,-7,2] u= [6,7,-2,8] x= [answer, answer, answer, answer]
Answers: 3
![v= [-2,-8,-7,2]\\u= [6,7,-2,8]](/tpl/images/0151/9036/e6f75.png)
![i\left | \begin{matrix}j&k&l\\-8&-7&2\\7&-2&8 \end{matrix} \right |=i\left [ j(-56+4)-k(-64-14)+l(16+49) \right ]=i(-52j+78k+65l)](/tpl/images/0151/9036/ed417.png)
![-j\left | \begin{matrix}i&k&l\\-2&-7&2\\6&7&8 \end{matrix} \right |=-j\left [ i(-56-14)-k(-16-12)+l(-14+42) \right ]=j(70i-28k-28l)](/tpl/images/0151/9036/ca07e.png)
![k\left | \begin{matrix}i&j&l\\-2&-8&2\\6&7&8 \end{matrix} \right |=k\left [ i(-64-14)-j(-16-12)+l(-14+48) \right ]=k(-78i+28j+34l)](/tpl/images/0151/9036/de4c1.png)
![-l\left | \begin{matrix}i&j&k\\-2&-8&-7\\6&7&-2 \end{matrix} \right |=-l\left [ i(16+49)-j(4+42)+k(-14+48) \right ]=-l(65i-46j+34k)](/tpl/images/0151/9036/f39eb.png)
is perpendicular to both u and v 
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Find a nonzero vector x perpendicular to the vector v= [-2,-8,-7,2] u= [6,7,-2,8] x= [answer, answer...
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