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anonymous

  • 5 years ago

let vector OP = 2i + 3j and vector OQ = -6i+4j. R is a point on vector PQ such that PR/RQ = k/1, where k>0. a/ express vector OR in terms of k, i and j. b/ express (vector OP)dot(vector OR) and (vector OQ)dot(vector OR) in terms of k. c/ Find the value of k such that OR bisects angle POQ.

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  1. anonymous
    • 5 years ago
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    a. OR= OP +PR

  2. anonymous
    • 5 years ago
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    where PR=k * RQ

  3. anonymous
    • 5 years ago
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    Coordinates of Q can be found by section formula

  4. anonymous
    • 5 years ago
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    i dont understand

  5. anonymous
    • 5 years ago
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    which part?

  6. anonymous
    • 5 years ago
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    should i find RQ in terms of k first ?

  7. anonymous
    • 5 years ago
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    yes

  8. anonymous
    • 5 years ago
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    RQ= (8k/k+1, -k/k+1)

  9. anonymous
    • 5 years ago
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    got it??

  10. anonymous
    • 5 years ago
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    can you show the step

  11. anonymous
    • 5 years ago
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    FIND R by section formula

  12. anonymous
    • 5 years ago
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    because i got (-4/1+k, 7/1+k)

  13. anonymous
    • 5 years ago
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    no, i think u made a mistake in doing the section formula...

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