if two vectors 2i+j+k and i+aj+3k are perpendicular to each other then find the magnitude of a
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SOLUTION
GIVEN
The vectors and are perpendicular to each other
TO DETERMINE
The value of a
EVALUATION
Here the given vectors are
and
Now the vectors are perpendicular to each other
So their dot product = 0
FINAL ANSWER
Hence the required value of a = - 5
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