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AP EAMCET2008MathematicsVector Algebra

The position vectors of P and Q are respectively a and b . If R is a point on PQ such that PR =5 PQ , then the position vector of R is

Options

  1. A5 b -4 a
  2. B5 b +4 a
  3. C4 b -5 a
  4. D4 b +5 a

Correct answer

A. 5 b -4 a

Step-by-step solution

Given that, It mean R divides P Q externally in the ratio 5: 4 . aligned Position vector of R & = 5 b -4 a 5-4 & =5 b -4 a aligned

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