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Question

Which one of the following describes the relationship among the three vectors,
^i+^j+^k, 2^i+3^j+^k, 5^i+6^j+4^k ?

A
The vectors are mutually perpendicular
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B
The vector are linearly dependent
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C
The vectors are linearly independent
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D
the vectors are unit vectors
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Solution

The correct option is B The vector are linearly dependent
To check linear dependency, let us consider the given vectors as columns of matrix (A).
i.e. A=[X1X2X3]=111231564
|A|=∣ ∣111231564∣ ∣
=63+(3)=0
linearly dependent.

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