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# C4 Vector line intersection

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1. Hey. I have looked at the mark scheme for question 7(ii). I got as far as getting b in terms of a but i dont understand where i should substitute it in to get a value for a and b. Any help would be much appreciated.
Question paper
https://5c59854d0ccd29d489c9e5e689a8...20C4%20OCR.pdf
Mark Scheme
https://5c59854d0ccd29d489c9e5e689a8...20C4%20OCR.pdf

Thanks.
2. (Original post by SamuelN98)
Hey. I have looked at the mark scheme for question 7(ii). I got as far as getting b in terms of a but i dont understand where i should substitute it in to get a value for a and b. Any help would be much appreciated.
Question paper
https://5c59854d0ccd29d489c9e5e689a8...20C4%20OCR.pdf
Mark Scheme
https://5c59854d0ccd29d489c9e5e689a8...20C4%20OCR.pdf

Thanks.

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