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B
x→a is a vector collinear to →a
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C
x→a and →a have independent directions
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D
None of these
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Solution
The correct option is Ax→a is a vector collinear to →a x→a is a vector in the direction of →a if x>0 x→a is a vector opposite to the direction of →a if x<0 ∴x→a is a vector collinear to →a Hence, option B.