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Math Help - Position Vectors

  1. #1
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    Position Vectors

    C is the point on AB such that AC:CB = 4:3. Express c in terms of a and b

    Please help !!!
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  2. #2
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    Quote Originally Posted by creatively12 View Post
    C is the point on AB such that AC:CB = 4:3. Express c in terms of a and b
    What kind course are you doing?
    Are there no notes or text book?
    These questions are so fundamental, you should have no trouble with them.

    c=a+\frac{4}{7}(b-a)
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  3. #3
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    thanks for your help, m doing A levels, yes there is a textbook but its not good, and m not that good with vectors actually.

    but the answer to this question is c = (3/7)a + (4/7)b
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  4. #4
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    Quote Originally Posted by creatively12 View Post
    but the answer to this question is c = (3/7)a + (4/7)b
    You are not doing anything for yourself!
    Had you, you would have seen
    c=a+\frac{4}{7}(b-a)=\frac{4}{7}b+\frac{3}{7}a.

    You must do more for yourself. That is the only way to learn mathematics.
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