A) 0
B) 1
C) \[\frac{5}{8}\]
D) \[\frac{8}{5}\]
Correct Answer: D
Solution :
[d] \[\because \vec{a},\vec{b}\,\,and\,\,\vec{c}\]are coplanar. \[\Rightarrow 2\left( 4-1 \right)-1\left( -6+4 \right)+x\left( 3-8 \right)=0\] \[2\times 3-1\times \left( -2 \right)+\times \left( -5 \right)=0\] \[6+2-5x=0\] \[5x=8\] \[\therefore x=\frac{8}{5}\] Hence, option [d] is correct.You need to login to perform this action.
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