A) \[{{C}_{1}}=0\]
B) \[{{C}_{1}}=1\]
C) \[{{C}_{1}}=2\]
D) No value of \[{{C}_{1}}\] can be found
Correct Answer: D
Solution :
To make three vectors coplanar \[[\overrightarrow{A}\,\overrightarrow{B}\,\overrightarrow{C}]=0\] The value of \[[\vec{A}\,\vec{B}\,\vec{C}]\] is independent of \[{{C}_{1}}\], hence no value of \[{{C}_{1}}\] can be found.
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