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General
Easy

Question

The vectors stack x with ‾ on top and stack y with ‾ on top satisfy the equation p stack x with rightwards arrow on top plus q stack y with ‾ on top equals stack a with rightwards arrow on top (where p comma q are scalar constants and stack a with rightwards arrow on top is a known vector). It is given that stack x with ‾ on top times stack y with rightwards arrow on top greater or equal than fraction numerator vertical line stack a with rightwards arrow on top vertical line to the power of 2 end exponent over denominator 4 p q end fraction, then ∣ x over y ∣ is equal to left parenthesis p q greater than 0 right parenthesis

  1. 1    
  2. fraction numerator p to the power of 2 end exponent over denominator q to the power of 2 end exponent end fraction    
  3. fraction numerator p over denominator q end fraction    
  4. fraction numerator q over denominator p end fraction    

The correct answer is: fraction numerator q over denominator p end fraction

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